Allow passing no refspecs to Fetch to use default

Fetch(Remote remote, FetchOptions options) was removed so we need a way to use the default refspec. This is done by passing an empty array of refspecs.

Author: jcansdale

src/GitHub.App/Services/GitClient.cs

@@ -74,27 +74,6 @@ public Task Push(IRepository repository, string branchName, string remoteName)
             });
         }
 
-        public Task Fetch(IRepository repository, string remoteName)
-        {
-            Guard.ArgumentNotNull(repository, nameof(repository));
-            Guard.ArgumentNotEmptyString(remoteName, nameof(remoteName));
-
-            return Task.Run(() =>
-            {
-                try
-                {
-                    repository.Network.Fetch(remoteName, new[] { "+refs/heads/*:refs/remotes/origin/*" }, fetchOptions);
-                }
-                catch (Exception ex)
-                {
-                    log.Error(ex, "Failed to fetch");
-#if DEBUG
-                    throw;
-#endif
-                }
-            });
-        }
-
         public Task Fetch(IRepository repo, UriString cloneUrl, params string[] refspecs)
         {
             foreach (var remote in repo.Network.Remotes)

src/GitHub.Exports.Reactive/Services/IGitClient.cs

@@ -25,20 +25,12 @@ public interface IGitClient
         /// <returns></returns>
         Task Push(IRepository repository, string branchName, string remoteName);
 
-        /// <summary>
-        /// Fetches the remote.
-        /// </summary>
-        /// <param name="repository">The repository to pull</param>
-        /// <param name="remoteName">The name of the remote</param>
-        /// <returns></returns>
-        Task Fetch(IRepository repository, string remoteName);
-
         /// <summary>
         /// Fetches from the remote, using custom refspecs.
         /// </summary>
         /// <param name="repository">The repository to pull</param>
         /// <param name="remoteName">The name of the remote</param>
-        /// <param name="refspecs">The custom refspecs</param>
+        /// <param name="refspecs">The custom refspecs no none to use the default</param>
         /// <returns></returns>
         Task Fetch(IRepository repository, string remoteName, params string[] refspecs);