git checkout gets stuck at 87%

git checkout gets stuck at 87%

I'm facing an unusual issue...
I am trying to do a simple git clone of a remote repo on github to my
local system. When I attempt to clone using both git , https or http
protocol , the transfer always stops at 87% and the data transfer rate
drops to 0 bytes/s. My network connection is stable.
Any ideas?
This is what I'm running:
~/workspace/code$ git clone http://github.com/neo/ruby_koans.git
Cloning into 'ruby_koans'...
remote: Counting objects: 1523, done.
remote: Compressing objects: 100% (1061/1061), done.
Receiving objects: 87% (1333/1523), 2.17 MiB | 0 bytes/s