Pushing to a remote git over a non-standard port

It took me a while to work out how to do this, so I thought I should write it down for my own use and for anybody else who wants it.

I have my SSH daemon running on a non-standard port and wanted to push to my git repository.

The key is to add the repository, like so:

git remote add reponame ssh://username@server:port/repo/location/.git

Then pushing is as simple as:

git push reponame localbranch:remotebranch