Yeah but that githook will only be installed on that one repo on that one machine. And they may have no or a different version of bash installed (on e.g. MacOS or Windows). IMHO, POSIX-compatible portable shell scripts are more trouble than portable Python scripts.

Pre-commit requires Python and pre-commit to be installed (and then it downloads every hook function).

This fetches the latest version of every hook defined in the .pre-commit-config.yml:

  pre-commit autoupdate

https://pre-commit.com/#pre-commit-autoupdate

A person could easily `ln -s repo/.hooks/hook*.sh repo/.git/hooks/` after every git clone.