Support for a console GitReadonlyInterface?

[jalaziz]

We're currently facing a problem that arose from the differences between JGit and console git v2.11. Starting in 2.11, git uses a variable abbreviation length based on the number of objects in the repo. Our repo has now gotten sufficiently large that we're starting to see 10 character commit SHA abbreviations when calling git describe.

While I know this is primarily a JGit issue, these types of divergent behavior would be easily solved by just using the command-line git binary.

Would it be possible to extend support for the console git beyond the runner?

[haavardw]

This would also be a workaround for the buggy JGit describe implementation #161