git-cleanup-repo

#!/bin/bash
# git-cleanup-repo
#
# Author: Rob Miller <rob@bigfish.co.uk>
# Adapted from the original by Yorick Sijsling

KEEP_BRANCHES='(master|staging|ci-[0-9]+)$'

git checkout master &> /dev/null

# Make sure we're working with the most up-to-date version of master.
git fetch

# Prune obsolete remote tracking branches. These are branches that we
# once tracked, but have since been deleted on the remote.
git remote prune origin

# List all the branches that have been merged fully into master, and
# then delete them. We use the remote master here, just in case our
# local master is out of date.
git branch --merged origin/master | egrep -v "$KEEP_BRANCHES" | xargs git branch
 -d

# Now the same, but including remote branches.
MERGED_ON_REMOTE=`git branch -r --merged origin/master | sed 's/ *origin\///' | 
egrep -v "$KEEP_BRANCHES"`

if [ "$MERGED_ON_REMOTE" ]; then
    echo "The following remote branches are fully merged and will be removed:"
    echo $MERGED_ON_REMOTE

    read -p "Continue (y/N)? "
    if [ "$REPLY" == "y" ]; then
        git branch -r --merged origin/master | sed 's/ *origin\///' \
            | egrep -v "$KEEP_BRANCHES" | xargs -I% git push origin :% 2>&1 \
            | grep --colour=never 'deleted'
        echo "Done!"
    fi
fi

git checkout master &> /dev/null