Merged tracked branches pruning to keep .git/config file clean

git-prune-tracked-branches

#!/usr/bin/env bash

current_branch=$(git rev-parse --abbrev-ref HEAD)

[ $current_branch == "master" ] || git checkout master
git fetch --all -p --tags
git pull

for BRANCH in $(git branch --merged origin/master | grep -v "\* master")
do
  git branch --unset-upstream $BRANCH
  git branch -d $BRANCH
done

[ $current_branch == "master" ] || git checkout -