Git branching & pulling

Hello,

I'm having trouble understanding branching and pull.

Using git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git
I can create a branch off the master and do a pull:

wink@ic2d1:~/linux/linux-2.6$ git-checkout master
Switched to branch "master"
wink@ic2d1:~/linux/linux-2.6$ git-checkout -b test
Switched to a new branch "test"
wink@ic2d1:~/linux/linux-2.6$ git-pull
Already up-to-date.



But from some reason using
git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm.git
the following happens

wink@ic2d1:~/linux/kvm-linux-2.6$ git-checkout master
Already on branch "master"
wink@ic2d1:~/linux/kvm-linux-2.6$ git-checkout -b test
Switched to a new branch "test"
wink@ic2d1:~/linux/kvm-linux-2.6$ git-pull
Warning: No merge candidate found because value of config option
         "branch.test.merge" does not match any remote branch fetched.
No changes.



What I notice is that in kvm.git that .git/remotes is empty while on
linux-2.6.git
.git/remotes has origin and it contains:

URL: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git
Pull: refs/heads/master:refs/heads/origin


Another difference is that the .git/config file of kvm.git has quite a
few items:

[core]
 repositoryformatversion = 0
 filemode = true
 bare = false
 logallrefupdates = true
[remote "origin"]
 url = git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm.git
 fetch = +refs/heads/*:refs/remotes/origin/*
[branch "master"]
 remote = origin
 merge = refs/heads/master



While linux-2.6.git is quite sparse:

[core]
        repositoryformatversion = 0
        filemode = true



Could someone give me some insight or point me at a url or doc
that could shed some light on what is happening and why git-pull
doesn't work on kvm.git.

Thanks,

Wink Saville