A system administration use case for git

Hello all, it's been quite a while.

And, no, I don't care that you ripped out git-rev-list --merge-order, it was fun while it lasted and it was still a cool (if under appreciated) algorithm :-)

I've got a system administration use case that I know git does 99.9% of. I am wondering if the last 0.1%.

It'd be nice to do this on arbitrary (non-git-controlled) file system tree:

* calculate the git hashes of the tree (without making copies of the
files in the tree)
* archive the tree hashes
* rsync the tree hashes to another place
* work out which files aren't available in the other place's git repo
* rsync those files the the other place

Is there a way to easily achieve this with git's existing tool set or a higher layer?

jon.