[ilyt]

Kinda does look like round peg square hole situation.

"Federated network" could be modeled by a stream of posts (comments, tweets, whatever else) that are either a start ("root") of conversation or reply to one or more previous post(s), so it does form a graph. Then a bunch of "indexes" like "each post with this tag", usually ordered via some kind of filter (time, how popular the twat posting it is, removing any offensive or NSFW ones etc).

But there is really nothing to merge and not much else common to git aside from sitting on its store and protocol