This is the field in the job GitInfo that the non-yet-official Heptapod runner expects to test the proper revision.
As the commit message says, I'd prefer in the absolute something more transparent, so that the runner could be Git and Mercurial capable and ready for the time we won't have also a Git SHA.
But for the time being, this is a tiny change on an API point that's not even called if there's no runner around. It can very well be improved, is probably a bit slow, but we can have it right now (for 0.6.1), and even maybe start using it on the present instance.
This can be considered to solve #69 (closed)