[Question] Fetching a new branch from remote

Greetings,

I have a short question about git fetch. Say there is a new branch, call it 'new-branch' in a remote repository. I am interested in this branch and want to fetch it to 'new-branch' in my local to track its progress.

I would expect this to do it:

% git fetch -f <url> new-branch

But, it doesn't.

Actually, I just noticed that this accomplishes the desired result...

% git fetch <url> new-branch:new-branch

I also just noticed that the man pages only says that '-f' works on tags. Should it work on branches? Either way, it wasn't clear to me how to fetch a new branch from a remote and store it under the same name locally. In my opinion, git fetch -f should do this if given a branchname from the remote.

Carl