#!/bin/bash
BRANCH=$(git remote show origin | sed -n '/HEAD branch/s/.*: //p')

echo "Update changes"
git fetch -u origin $BRANCH:$BRANCH
git pull --ff-only origin $BRANCH:$BRANCH
echo "Changing branch to $BRANCH"
git checkout $BRANCH
echo "Prunning local branches that were removed in remote..."
git remote update --prune
git fetch -p && for branch in `git branch -vv | grep ': gone]' | awk '{print $1}'`; do git branch -D $branch; done
echo "Git GCing"
git gc
git prune
echo "Done"
echo "Listing remaining branches:"
git branch --list