Here\'s a common workflow hurdle I encounter often:
$ git status
# On branch master
nothing to commit (working
If you don't need the branch around:
If you've merged foo back to master, "git branch -d foo" to kill the topic branch, and then "checkout -b foo" in the future when you need to hack on it again.
If you do need the branch around:
You can rebase your topic branch against the master branch:
git checkout foo
git rebase master
Or:
git rebase master foo