I've worked in urban development for almost 10 years, and this was much needed. At several points I tried to implement a git worlflow for gis data since errors, rollbacks, and uncontrolled changes where incredibly common and sometimes very expensive. I failed because the miriad of formats. This projects hits a real need.
I work in the GIS space, and I've even built some simular systems, such a multiplayer map editing.
Even with that background I'm having a hard time understand _what_ this really is? Is it a git wrapper with some geospatial features? Why git for geospatial at all?