[Nouveau] updating the source tree

[Grzesiek Sójka]

Hi there,

I downloaded the nouveau/linux-2.6 using the following:
git clone --depth 1 git://anongit.freedesktop.org/nouveau/linux-2.6
Is there an easy way to update it to the current version (reversing all 
the changes I made) without downloading all the files again??

Thanks for your help in advance.

greg