#!/bin/sh

set -euo pipefail

repo_name="blah
repo_url="http://example.com/git/${repo_name}.git"
backuproot="/var/gitbackups"
backupdir="${backuproot}/${repo_name}-$(date +%s)"

git clone "${repo_url}" "${backupdir}"

cd "${backupdir}"

branches="$(git branch -r | grep -V "origin/HEAD" | sed 's@origin/@@' | sed 's/ //g' )"

echo "$branches" | while read branch; do
  git checkout "$branch
  git pull
done