Rebasing Multiple branches at once...

Hi,

I have a master branch, a dev branch and a number of feature branches from dev. And I was wondering if there was an easy way to rebase dev and all of it's sub-branches onto master.

I know I can run this as a series of commands, and use --onto to do this, but was wondering if there was an easier way. As running:

git rebase master

when on the dev branch only rebases dev and not it's dependent branches.

Thanks!

R.