git-branch and git-remotes confusion

Hi,

maybe I'm daft, or cogito has eaten my brain. The task at hand is
really simple: clone from repo X, tracking branch Y (where branch Y !=
HEAD). The repo is http://git.catalyst.net.nz/git/moodle-r2.git , the
branch is mdl18-olpc .

With cg, this is trivial:

  cg-clone http://git.catalyst.net.nz/git/moodle-r2.git#mdl18-olpc

which automagically gives me a "master" and "origin" pair of heads
that do the right thing. Specifically, cg-update does the right thing.

With git 1.5.x, I managed to figure out that this is wrong. :

  git-clone --origin mdl18-olpc \
      http://git.catalyst.net.nz/git/moodle-r2.git

and now I am trying to see if some incantation around this works

   git-clone http://git.catalyst.net.nz/git/moodle-r2.git
   git-branch --track origin/mdl18-olpc my18-olpc

But it isn't working, and I'm reading git/Documentation for git-branch
and git-remote but I can't find it. I don't care about any other
branch (though if they are there, fine!). Is there a trivially simple
answer.

(Cogito has eaten my brain probably. For a long time I've always
cloned with cogito just for the sake of this convenience, even if I
was going to use git mostly when working with the code. Now I'm
working on a server that only has git, so I thought 1.5.x would make
this trivial...)

cheers,



martin