Not sure if this is the expected behaviour but the logging on choosing not to clone is misleading
wmf3158:wmf-dev username$ mw docker mediawiki get-code ? MediaWiki code not detected in /Users/username/git/gerrit/mediawiki/core. Do you want to clone it now? (Negative answers will abort this command) No ? Vector skin is not detected in /Users/username/git/gerrit/mediawiki/core. Do you want to clone it now? No If you want to clone more skins and extensions please use the --skin and --extension options... ? How do you want to interact with Gerrit for the cloned repositores? ssh ? What is your Gerrit username? **gerrit_user** Cloning repositories... Repositories cloned.