pre-push.sh

#!/bin/sh

# credit to https://gist.github.com/stefansundin/d465f1e331fc5c632088

PUSH_COMMAND=`ps -ocommand= -p $PPID`
while read local_ref local_sha remote_ref remote_sha
do
  if [[ "$remote_ref" =~ master && "$PUSH_COMMAND" =~ force|delete|-f ]]; then
    echo "Prevented force-push to $remote_ref. This is a very dangerous command."
    echo "If you really want to do this, use --no-verify to bypass this pre-push hook."
    exit 1
  fi
done