How do I delete a remote branch in Git? [duplicate]

I created a branch notmaster to commit as well as push some changes. When I was finished with that branch, I merged the changes back into master, pushed them out, and then deleted the local notmaster.

$ git branch -a
* master
  remotes/origin/master
  remotes/origin/notmaster

Is there anyway to delete the remote notmaster?

A little more clarity, with the solution from Ionut:

The usual method failed for me:

$ git push origin :notmaster
error: dst refspec notmaster matches more than one.

That's because I had a tag with the same name as the branch. This was a poor choice on my behalf and caused the ambiguity. So in that case:

$ git push origin :refs/heads/notmaster

git push origin :notmaster, which basically means "push nothing to the notmaster remote".

I had the same issue. I had both a branch and a tag named 3.2. That's why it says there's more than one match:

git error: dst refspec 3.2 matches more than one.

Here's how to delete the branch:

git push origin :heads/3.2

And here's how to delete the tag:

git push origin :tags/3.2 

git push origin --delete notmaster

If you're using Git 1.7.0 or later, this will do the trick. Prior to Git 1.7.0, you needed to use the less intuitive (but equally effective) syntax:

git push origin :notmaster

The older syntax still works in newer versions of Git, but the newer syntax seems more humane and easier to remember. If I want to delete a branch, typing --delete seems like the natural thing to do.

From the 1.7.0 release notes:

"git push" learned "git push origin --delete branch", a syntactic sugar for "git push origin :branch".