@holger There isn't anything but Github if you want Github. Bitbucket isn't like Github and neither is Gitlab.
How much Github are you willing to give up? Depending on the degree of non-githubness you're willing to tolerate, there's sr.ht, Heptapod, Kallithea, or built-in hgweb.
The social network of the future: No ads, no corporate surveillance, ethical design, and decentralization! Own your data with Mastodon!