Set a github username in the package administration panel for this bundle. Go at the platform root and run "mkdir git".
These commands will fetch sources from the vendor you pick, and push on the fork of your github username.
php app/console claroline:git:translations VENDOR_NAME BUNDLE_NAME --init
php app/console claroline:git:translations VENDOR_NAME BUNDLE_NAME --commit
php app/console claroline:git:translations VENDOR_NAME BUNDLE_NAME --pull