can't git the source code of nfs from linux-nfs

hi, Everyone, I'm trying to get nfs's source code from bhalevy's Git repository. After a while of struggle, it give me this: git clone git://git.linux-nfs.org/projects/bhalevy/linux-pnfs.git Initialized empty Git repository in /home/kos/kernel/pnfs/linux-pnfs/.git/ git.linux-nfs.org[0: 173.201.45.137]: errno=Connection timed out fatal: unable to connect a socket (Connection timed out) Could anybody tell me what‘s wrong with this? And how can I get the source back? Lots of thanks.