Sets up a git hook using specified script. Creates hook directory if needed, and sets correct permissions on hook.
use_git_hook(hook, script)Hook name. One of "pre-commit", "prepare-commit-msg", "commit-msg", "post-commit", "applypatch-msg", "pre-applypatch", "post-applypatch", "pre-rebase", "post-rewrite", "post-checkout", "post-merge", "pre-push", "pre-auto-gc".
Text of script to run
Other git helpers: use_git_config,
use_git_ignore, use_git