[capableweb]

You really don't need all of that just to support pulling a Git repository, private or otherwise. Adding async nature to a technical problem (webhooks + API as you suggest) immediately makes a otherwise sync problem way harder and error prone.

> I bet GitHub covers the vast majority of their target users.

Sure, but if they added Git, they would reach everyone using GitHub + everyone else who is using Git.

With powerful primitives you can build powerful abstractions, Git is one of the examples of this. But if you instead focus on a single-use case (using GitHub), adding the rest becomes a lot harder, than if you started with the basics. Something 90% of product people in SF seems to have forgotten lately (or never learned?)