Prune Git's local orphan references, merged feature branches, remote tracking references, and more

git-prune.sh

#!/bin/bash

# Prune local orphan refs
git prune -v

# Deletes all stale (local) remote-tracking branches under origin.
# These stale branches have already been removed from the remote repository
# referenced by <name>, but are still locally available.
git remote prune origin

# After fetching, remove any remote-tracking references that no longer exist on the remote.
git fetch --all --prune

# Delete all local branches that are already merged into master (excluding master, dev, and current branch)
git branch --merged master | sed -e 's/^[[:space:]]\+//g' | egrep -v "(^\*|master|dev)" | xargs git branch -d

# Delete all *remote* branches in origin that are already merged into master:
git push &&
git pull &&
git branch -r --merged master | sed -e 's/^[[:space:]]\+//g' | egrep -v "(^\*|master|dev)" | grep ^origin/ | sed -e 's/^origin\///g' | xargs -n 1 git push --delete origin

# Clean up removed remotes again, just in case
git remote prune origin