I'm not sure if this is a joke, but I'll humor you. Yes - it's called git.

I’m not sure if this is a joke, but I’ll humor you. GitHub is way more than git.

Gitlab is working on federation, or they at least have an open issue about it.[1]

Meanwhile there is a federated git as a reference implementation called Forgefed.[2]

1. https://gitlab.com/gitlab-org/gitlab/-/issues/6468

2. https://forgefed.peers.community/

Is there a confusion in question ? GitHub is centralized, the Git protocol is decentralized. I dont fully understand your response.

Yes, Fossil.

https://fossil-scm.org/

+1 This is the first thing that came to mind. Like a torrent swarm of the repo where people can still make commits and pull requests so that development can continue.

Yes, gittorrent: https://blog.printf.net/articles/2015/05/29/announcing-gitto...

HN post: https://news.ycombinator.com/item?id=9625840