Guess it's time for yet another fork...
Also the post seems to contradict itself:
Both Forgejo and Git must be used together
Forgejo codebase includes basic support for go-git, a Go package distributed under a permissive license that can be used in place of Git
And the fact that it only needs an external binary that understands git commands tells me that it's not technically tied to "Git proper" as much as they want us to believe.