[1]: http://archiveteam.org/index.php?title=SourceForge
[2]: https://github.com/ArchiveTeam/sourceforge-grab
[3]: https://github.com/ArchiveTeam/sourceforge-grab-rsync
The best place to pop in is probably on IRC. For the Sourceforge project it's #coldstorage on EFnet, http://chat.efnet.org:9090/?nick=&channels=%23coldstorage&Lo... for the web client. Though note, the ArchiveTeam project seems to be paused right now.
Gitlab has a community edition, and then there's Gogs, Kallithea and a few others.
[1]: http://archiveteam.org/index.php?title=SourceForge
[2]: https://github.com/ArchiveTeam/sourceforge-grab
[3]: https://github.com/ArchiveTeam/sourceforge-grab-rsync