Allow admins to set custom prefix, suffix, and leading zero length values for the order numbers, invoices, shipments, and credit memos by overriding the Magento_SalesSequence module's default pattern
$ composer config repositories.augustash-customordernumber vcs https://github.com/augustash/magento2-module-sales-sequence-customordernumber.git
$ composer require augustash/module-sales-sequence-customordernumber:~1.0.2