#!/usr/bin/env bash

while read precommit postcommit refname
do
    echo "precommit: ${precommit}; postcommit: ${postcommit}; refname: ${refname}"
    if [[ "${precommit}" != "0000000000000000000000000000000000000000" ]]; then
        git diff --name-status $precommit $postcommit
    fi
done