Well.. that's what the Abstract is; Visual Git for Sketch files. We're using Abstract + Sketch at the moment and I can't complain. Being able to export the file or opening it track/untracked is a real benefit sometimes.

That said, Figma promises to be the combination of Abstract + Sketch + Invision and thats what has me intrigued. Going to a Figma webinar may ease a lot of my worry.