git-update

git-update.sh

#!/bin/bash
# Temporarily checks out the "master" branch, fetches updates from upstream,
# pushes a copy to "origin" to keep it in synch, and then returns to the original
# branch.
#
# Released under the WTFPL license version 2 http://sam.zoy.org/wtfpl/
#
# Copyright (c) 2014 Sanne Grinovero

requireBranchName() {
   branch_name="$(git symbolic-ref HEAD 2>/dev/null)"
   if [ "$?" -eq 128 ]
   then
      echo "Current branch not defined - aborting"
      exit -1
   fi
   branch_name=${branch_name##refs/heads/}
}

requireBranchName
git fetch upstream
git checkout -q master
git pull --ff-only upstream master
git push origin master
git checkout -q ${branch_name}
echo "Master updated"