This is an empty 'master' repository.
If you did a
git clone git://......../xmpppy
and got this instead - that means that you must do one more step:
git checkout remotes/origin/<branchname>
where <branchname> is one of following:
irc-transport
mail-transport
mxit-transport
skype-transport
xmppd.py
xmpppy
yahoo-transport