Thanks @zero for mentioning this thread here https://community.vcvrack.com/t/patch-version-control/6893 I had not found this one.
My main problem with working with git that way, or any other SCM for that matter, is that it is even more steps than just renaming a patch.
For a few other programs I just monitor the project directory and have the script auto-commit to Fossil on changes to to the files. Have not tried this with Rack yet as I have no idea what and when it writes to the files. Only on saves?
Ingo