Use Tangled ! https://tangled.org/

It's a social network with github-like social features and git hosting, but you can still self host your git and have all the features like issues, PRs and so on just like GitHub.

And it's built on ATProto so you can also have your issues PRs and so on hosted on your infra, but everything interconnects nicely with your single account, just like using GitHub.

They even added a vouching system for users, to know who to trust based on who you already trusted.