No need to install Python, pip, or pre-commit.

If Docker is set up, the only thing you need to do is to set this in file .git/hooks/pre-commit (Windows variant):

#!/bin/bash

MSYS_NO_PATHCONV=1 docker run --rm --network=none -v $(pwd):/repo:ro -w /repo ghcr.io/gitleaks/gitleaks:latest git --pre-commit --redact --staged --verbose

For *nix systems, you can omit the MSYS_NO_PATHCONV=1 part.