clean a git repo

gistfile1.txt

git checkout master
git fetch
git remote prune origin
git branch --merged master | grep -v 'master$' | xargs git branch -d
git branch -r --merged master | sed 's/ *origin\///' | grep -v 'master$'

read -p "Continue (y/n)? "
if [ "$REPLY" == "y" ]
then
  git branch -r --merged master | sed 's/ *origin\///' | grep -v 'master$' | xargs -I% git push origin :%
  echo "Done!"
fi