Might want to let git know. It's been a part of the git source code since 2006. If there were an RCE vulnerability from using __git_ps1, one would hope it would have been found by now!
https://github.com/git/git/blob/master/contrib/completion/gi...
https://github.com/git/git/blob/master/contrib/completion/gi...
I was also able to reproduce it with `GIT_PS1_SHOWDIRTYSTATE=1` which invokes `git diff`.
As far as I am aware, this has been brought to the attention of the git maintainers years ago: https://github.com/justinsteven/advisories/blob/main/2022_gi...