Almost hard to believe it's finally happening! Couldn't we have gone with Git all along, without Subversion as an intermediary step for about a decade?
Anyhow, per https://wiki.freebsd.org/git, looks like GitHub/GitLab will have the new stuff on Tuesday, 2020-12-22T10:00Z; this'll likely require manual actions if you're exporting Git from GitHub. Personally, I'll probably be switching over to exporting directly from FreeBSD.org at that time, because GitHub still doesn't even support IPv6.
Anyhow, per https://wiki.freebsd.org/git, looks like GitHub/GitLab will have the new stuff on Tuesday, 2020-12-22T10:00Z; this'll likely require manual actions if you're exporting Git from GitHub. Personally, I'll probably be switching over to exporting directly from FreeBSD.org at that time, because GitHub still doesn't even support IPv6.