How to register an account on GitLab. Due to spam, new accounts are locked until approved by an admin or the approver bot. Your GitLab account gets automatically approved within one hour if you are a member of Trusted Contributors in Gerrit, or a member of the Trusted-Contributors group in Phabricator and linked your Developer account to your Phabricator account. If none of these apply, you can file an unlock request to expedite access.
Support: mw:GitLab, how to host a project on GitLab, #wikimedia-gitlab on libera.chat, #GitLab on Phabricator.
The script has the ability to fix commit of mediawiki/core to branch to. That was introduced back in 2016 while we branched REL1_28, I guess that is because the script wasn't stable and we wanted to avoid moving the branch. This has not been used since REL1_30 and I don't think we will ever need it in the future.