prune.sh

#!/bin/bash

# You can run this to make fetch automatically prune any time you pull or
# fetch.
#
# git config remote.origin.prune true
git fetch --prune

# Abort early if there are local changes
git checkout master || exit

git pull --ff-only origin master || exit

# Remove any local branches that have been merged
git branch --merged master | grep -v "\*" | xargs -n 1 git branch -d

echo "These remote branches have not been merged into origin/master"
git branch -r --no-merge origin/master

echo "These local branches have not been merged into origin/master"
git branch --no-merge origin/master