how to checkout current stable branch

[Bernd Kreuss]

This is probably a stupid question but how do I checkout the 0.2.1
branch from git? With svn I knew how to do such things but I don't get
how this git thing is meant to be used.

I have successfully checked out the master branch via git clone
git://git.torproject.org/tor.git and can compile it but what is the URL
for the 0.2.1 branch? I can't find any instructions about this.

Bernd