For an outlandish answer, what you could do is use sshfs to mount the remote system upon where ever you do have git, and then run your commands that way. Approach the problem from a different frame of reference: Instead of wondering how to run commands where the tool is not, why not create an environment where the data comes to your tool ( via sshfs? ).
In many situations and in this too, you can't create data with more advanced tool and use it with less advanced. It's a happy coincidence that patch works for non-binary git-diffs. Git diff introduces an extension to standard diff.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.