From http://devblog.springest.com/a-script-to-remove-old-git-branches

gistfile1.txt

# This has to be run from master
git checkout master

# Update our list of remotes
git fetch
git remote prune origin

# Remove local fully merged branches
git branch --merged master | grep -v 'master$' | xargs git branch -d

# Show remote fully merged branches
# echo "The following remote branches are fully merged into master and will be removed:" git branch -r --merged master | sed 's/ *origin\///' | grep -v 'master$'
# read -p "Continue (y/n)? " if [ "$REPLY" == "y" ] then # Remove remote fully merged branches git branch -r --merged master | sed 's/ *origin\///' | grep -v 'master$' | xargs -I% git push origin :% echo "Done!" say "Obsolete branches are removed" fi

# garbage collect git
git gc --aggressive