Trouble cloning repository from sever

[Dont Panic]

Hi,
I'm a newbie and having trouble getting a source code tree. I used
command:

git clone https://android.googlesource.com/kernel/samsung.git

per instructions at

http://source.android.com/source/downloading.html

It appears to succeed abd produces a "samsung" directory with a ".git"
in it, containing many megabytes of data, but no source tree. Ok, I
then tried "git checkout master". Still no joy. Can anybody help
this newbie understand what I'm doing wrong?

I'm doing this on Ubuntu 10.04.3 LTS.

Thanks in advance.
-John