gc repack prune all visible git working repositories

git_repack_all.zsh

#!/bin/zsh

# Can't figure out how this works or why you might want to do this? Don't do it.
# Don't. Do. It.

pushd
locate -b '\.git' | while read -t 1 repo
do
  cd "$(dirname "$repo")"
  git gc
  git repack -Ad
  git prune
done
popd