Arch Linux have used their own gitlab instance for a long time (though with mirrors to GitHub). Debian and Fedora have both run their own infra for git for a long time. Not sure about other distros. I was surprised Gentoo used GitHub at all.

Pretty sure several of these distros started doing this with cvs or svn way back before git became popular even.

I mean, gitlab is only from ~2019.

The first hit I could find of a git repository hosted on `archlinux.org` is from 2007; https://web.archive.org/web/20070512063341/http://projects.a...