Using GIT with FrameMaker

Hi,
My Technical Documentation team has recently been informed that we are to be
moving to GIT for our version control.
We will be working in GIT GUI or GIT extensions.
I see, however, that you cannot properly use the "diff" view properly with the
FrameMaker files, but only, from what I can tell, .txt, and .html.
Is there a good way to work with GIT from FrameMaker?

Thanks