I prefer self-hosting Git. Those options are more mature than most Nostr options, and with federation being implemented in Forgejo (which is a perfect use case for federated protocols) I see that it is the best option.

I am considering implementing Nostr sign-in as an external IdP if the need arises.

We already have been nostr:npub1s3ht77dq4zqnya8vjun5jp3p44pr794ru36d0ltxu65chljw8xjqd975wz

nostr:naddr1qvzqqqrhnypzplfq3m5v3u5r0q9f255fdeyz8nyac6lagssx8zy4wugxjs8ajf7pqy2hwumn8ghj7un9d3shjtnyv9kh2uewd9hj7qq2g9kx27rpdej8y6tpq7z4jt

Can help getting git remotes available for working with git on nostr :)