diff --git a/src/FileFetcher.php b/src/FileFetcher.php
index 3677715..e208eff 100644
--- a/src/FileFetcher.php
+++ b/src/FileFetcher.php
@@ -34,30 +34,36 @@ class FileFetcher {
   protected $filenames;
   protected $fs;
 
-  public function __construct(RemoteFilesystem $remoteFilesystem, $source, $filenames = [], IOInterface $io, $progress = TRUE) {
+  public function __construct(RemoteFilesystem $remoteFilesystem, $source, IOInterface $io, $progress = TRUE) {
     $this->remoteFilesystem = $remoteFilesystem;
     $this->io = $io;
     $this->source = $source;
-    $this->filenames = $filenames;
     $this->fs = new Filesystem();
     $this->progress = $progress;
   }
 
-  public function fetch($version, $destination) {
-    array_walk($this->filenames, function ($filename) use ($version, $destination) {
-      $url = $this->getUri($filename, $version);
-      $this->fs->ensureDirectoryExists($destination . '/' . dirname($filename));
-      if ($this->progress) {
-        $this->io->writeError("  - <info>$filename</info> (<comment>$url</comment>): ", FALSE);
-        $this->remoteFilesystem->copy($url, $url, $destination . '/' . $filename, $this->progress);
-        // Used to put a new line because the remote file system does not put
-        // one.
-        $this->io->writeError('');
-      }
-      else {
-        $this->remoteFilesystem->copy($url, $url, $destination . '/' . $filename, $this->progress);
+  public function fetch($version, $destination, $erase) {
+    foreach ($this->filenames as $sourceFilename => $filename) {
+      $target = "$destination/$filename";
+      if ($erase || !file_exists($target)) {
+        $url = $this->getUri($sourceFilename, $version);
+        $this->fs->ensureDirectoryExists($destination . '/' . dirname($filename));
+        if ($this->progress) {
+          $this->io->writeError("  - <info>$filename</info> (<comment>$url</comment>): ", FALSE);
+          $this->remoteFilesystem->copy($url, $url, $target, $this->progress);
+          // Used to put a new line because the remote file system does not put
+          // one.
+          $this->io->writeError('');
+        }
+        else {
+          $this->remoteFilesystem->copy($url, $url, $target, $this->progress);
+        }
       }
-    });
+    }
+  }
+
+  public function setFilenames(array $filenames) {
+    $this->filenames = $filenames;
   }
 
   protected function getUri($filename, $version) {
diff --git a/src/Handler.php b/src/Handler.php
index e1db55b..5b6cda6 100644
--- a/src/Handler.php
+++ b/src/Handler.php
@@ -135,11 +135,12 @@ public function downloadScaffold() {
 
     $remoteFs = new RemoteFilesystem($this->io);
 
-    $fetcher = new PrestissimoFileFetcher($remoteFs, $options['source'], $files, $this->io, $this->progress, $this->composer->getConfig());
-    $fetcher->fetch($version, $webroot);
+    $fetcher = new PrestissimoFileFetcher($remoteFs, $options['source'], $this->io, $this->progress, $this->composer->getConfig());
+    $fetcher->setFilenames(array_combine($files, $files));
+    $fetcher->fetch($version, $webroot, true);
 
-    $initialFileFetcher = new InitialFileFetcher($remoteFs, $options['source'], $this->getInitial(), $this->io, $this->progress);
-    $initialFileFetcher->fetch($version, $webroot);
+    $fetcher->setFilenames($this->getInitial());
+    $fetcher->fetch($version, $webroot, false);
 
     // Call post-scaffold scripts.
     $dispatcher->dispatch(self::POST_DRUPAL_SCAFFOLD_CMD);
diff --git a/src/InitialFileFetcher.php b/src/InitialFileFetcher.php
deleted file mode 100644
index 1379e6d..0000000
--- a/src/InitialFileFetcher.php
+++ /dev/null
@@ -1,32 +0,0 @@
-<?php
-
-/**
- * @file
- * Contains \DrupalComposer\DrupalScaffold\FileFetcher.
- */
-
-namespace DrupalComposer\DrupalScaffold;
-
-class InitialFileFetcher extends FileFetcher {
-
-  public function fetch($version, $destination) {
-    array_walk($this->filenames, function ($filename, $sourceFilename) use ($version, $destination) {
-      $target = "$destination/$filename";
-      if (!file_exists($target)) {
-        $url = $this->getUri($sourceFilename, $version);
-        $this->fs->ensureDirectoryExists($destination . '/' . dirname($filename));
-        if ($this->progress) {
-          $this->io->writeError("  - <info>$filename</info> (<comment>$url</comment>): ", FALSE);
-          $this->remoteFilesystem->copy($url, $url, $target, $this->progress);
-          // Used to put a new line because the remote file system does not put
-          // one.
-          $this->io->writeError('');
-        }
-        else {
-          $this->remoteFilesystem->copy($url, $url, $target, $this->progress);
-        }
-      }
-    });
-  }
-
-}
diff --git a/src/PrestissimoFileFetcher.php b/src/PrestissimoFileFetcher.php
index 2b05672..abc501b 100644
--- a/src/PrestissimoFileFetcher.php
+++ b/src/PrestissimoFileFetcher.php
@@ -19,26 +19,30 @@ class PrestissimoFileFetcher extends FileFetcher {
    */
   protected $config;
 
-  public function __construct(\Composer\Util\RemoteFilesystem $remoteFilesystem, $source, array $filenames = [], IOInterface $io, $progress = TRUE, Config $config) {
-    parent::__construct($remoteFilesystem, $source, $filenames, $io, $progress);
+  public function __construct(\Composer\Util\RemoteFilesystem $remoteFilesystem, $source, IOInterface $io, $progress = TRUE, Config $config) {
+    parent::__construct($remoteFilesystem, $source, $io, $progress);
     $this->config = $config;
   }
 
-  public function fetch($version, $destination) {
+  public function fetch($version, $destination, $erase) {
     if (class_exists(CurlMulti::class)) {
-      $this->fetchWithPrestissimo($version, $destination);
+      $this->fetchWithPrestissimo($version, $destination, $erase);
       return;
     }
-    parent::fetch($version, $destination);
+    parent::fetch($version, $destination, $erase);
   }
 
-  protected function fetchWithPrestissimo($version, $destination) {
+  protected function fetchWithPrestissimo($version, $destination, $erase) {
     $requests = [];
-    array_walk($this->filenames, function ($filename) use ($version, $destination, &$requests) {
-      $url = $this->getUri($filename, $version);
-      $this->fs->ensureDirectoryExists($destination . '/' . dirname($filename));
-      $requests[] = new CopyRequest($url, $destination . '/' . $filename, false, $this->io, $this->config);
-    });
+
+    foreach ($this->filenames as $sourceFilename => $filename) {
+      $target = "$destination/$filename";
+      if ($erase || !file_exists($target)) {
+        $url = $this->getUri($sourceFilename, $version);
+        $this->fs->ensureDirectoryExists($destination . '/' . dirname($filename));
+        $requests[] = new CopyRequest($url, $target, false, $this->io, $this->config);
+      }
+    }
 
     $successCnt = $failureCnt = 0;
     $totalCnt = count($requests);
diff --git a/tests/FetcherTest.php b/tests/FetcherTest.php
index 8401aa9..34e1526 100644
--- a/tests/FetcherTest.php
+++ b/tests/FetcherTest.php
@@ -63,8 +63,12 @@ protected function ensureDirectoryExistsAndClear($directory) {
   }
 
   public function testFetch() {
-    $fetcher = new FileFetcher(new RemoteFilesystem(new NullIO()), 'http://cgit.drupalcode.org/drupal/plain/{path}?h={version}', ['.htaccess', 'sites/default/default.settings.php'], new NullIO());
-    $fetcher->fetch('8.1.1', $this->tmpDir);
+    $fetcher = new FileFetcher(new RemoteFilesystem(new NullIO()), 'http://cgit.drupalcode.org/drupal/plain/{path}?h={version}', new NullIO());
+    $fetcher->setFilenames([
+      '.htaccess' => '.htaccess',
+      'sites/default/default.settings.php' => 'sites/default/default.settings.php',
+    ]);
+    $fetcher->fetch('8.1.1', $this->tmpDir, true);
     $this->assertFileExists($this->tmpDir . '/.htaccess');
     $this->assertFileExists($this->tmpDir . '/sites/default/default.settings.php');
   }
@@ -73,10 +77,14 @@ public function testFetch() {
    * Tests version specific files.
    */
   public function testFetchVersionSpecific() {
-    $fetcher = new FileFetcher(new RemoteFilesystem(new NullIO()), 'http://cgit.drupalcode.org/drupal/plain/{path}?h={version}', ['.eslintrc', '.eslintrc.json'], new NullIO());
+    $fetcher = new FileFetcher(new RemoteFilesystem(new NullIO()), 'http://cgit.drupalcode.org/drupal/plain/{path}?h={version}', new NullIO());
+    $fetcher->setFilenames([
+      '.eslintrc' => '.eslintrc',
+      '.eslintrc.json' => '.eslintrc.json',
+    ]);
 
     $this->setExpectedException(TransportException::class);
-    $fetcher->fetch('8.2.x', $this->tmpDir);
+    $fetcher->fetch('8.2.x', $this->tmpDir, true);
 
     $this->assertFileExists($this->tmpDir . '/.eslintrc');
     $this->assertFileNotExists($this->tmpDir . '/.eslintrc.json');
@@ -85,15 +93,18 @@ public function testFetchVersionSpecific() {
     @unlink($this->tmpDir . '/.eslintrc');
 
     $this->setExpectedException(TransportException::class);
-    $fetcher->fetch('8.3.x', $this->tmpDir);
+    $fetcher->fetch('8.3.x', $this->tmpDir, true);
 
     $this->assertFileExists($this->tmpDir . '/.eslintrc.json');
     $this->assertFileNotExists($this->tmpDir . '/.eslintrc');
   }
 
   public function testInitialFetch() {
-    $fetcher = new InitialFileFetcher(new RemoteFilesystem(new NullIO()), 'http://cgit.drupalcode.org/drupal/plain/{path}?h={version}', ['sites/default/default.settings.php' => 'sites/default/settings.php'], new NullIO());
-    $fetcher->fetch('8.1.1', $this->tmpDir);
+    $fetcher = new FileFetcher(new RemoteFilesystem(new NullIO()), 'http://cgit.drupalcode.org/drupal/plain/{path}?h={version}', new NullIO());
+    $fetcher->setFilenames([
+      'sites/default/default.settings.php' => 'sites/default/settings.php',
+    ]);
+    $fetcher->fetch('8.1.1', $this->tmpDir, false);
     $this->assertFileExists($this->tmpDir . '/sites/default/settings.php');
   }
 }