Local git mirror of github used by private Jenkins

gistfile1.txt

So I've installed a dead simple backup, in /home/USER/git_backup/:

    git clone --mirror git@github.com:USER/PROJECT.git
    update.sh (launched every 5 minutes by cron):

#/bin/sh

cd /home/USER/git_backup/PROJECT.git
LINES=`git remote update 2>&1 | wc -l`

if [ $LINES -eq 1 ]; then
   # only one line "Fetching origin"?
   echo "Project didn't change"
else
   echo "Project changed, notify jenkins builds"
   curl http://JENKINS:8080/git/notifyCommit?url=git@github.com:USER/PROJECT.git
fi

This keeps a perfect copy (mirror) of the PROJECT github repository, and if there's a change when doing the "git remote update", jenkins is notified, and it'll then poll github to check if it should run the builds related to the url provided.