DWIM "git checkout frotz" to "git checkout -b frotz origin/frotz"

Hi,

Peter and I just stumbled on the following interpretations of the checkout command.

 git checkout origin/frotz      -> detaches HEAD
 git checkout -t origin/frotz   -> git checkout -b frotz origin/frotz
 git checkout frotz             -> git checkout -b frotz origin/frotz
 git checkout -t frotz          -> fatal: Missing branch name

I was surprised by the third one, which I was expecting to fail. Apparently it's a DWIM feature introduced in commit 70c9ac2f. I doubt that is what the user was trying to do if they ran that command. If anything, this behavior will serve to confuse them.

I think git checkout -t <remote>/<branch> is short enough for creating a new tracking branch. For something even shorter, we can create an alias. But I'd prefer to keep the already complex checkout command a little simpler.

Regards, Clemens