post-receive hook for multiple branches

post-receive.sh

#!/bin/bash

while read oldrev newrev ref
do
  branch=`echo $ref | cut -d/ -f3`

  if [ "master" == "$branch" ]; then
    git --work-tree=./path/under/root/dir/live-site/ checkout -f $branch
    echo 'Changes pushed live.'
  fi

  if [ "dev" == "$branch" ]; then
    git --work-tree=./path/under/root/dir/dev-site/ checkout -f $branch
    echo 'Changes pushed to dev.'
  fi
done

# Taken from: http://blog.ekynoxe.com/2011/10/22/git-post-receive-for-multiple-remote-branches-and-work-trees/

@benfrain thanx for the trick!
I improved it by making destination folder dynamic, see here: https://coderwall.com/p/qjmp1g

thank you for the script

I did everything, the commit worked correctly but the files do not appear in the remote repository.
Can you help me?