git clone over HTTP failing one time out of four

Given the discussion about HTTP clones on October 12th, this isn't a 
huge surprise, but I thought I'd throw this out there.

I've been doing a large number of clones of 
http://repo.or.cz/r/kdebase.git.  Approximately 1 time in 4 this fails 
with an error like:

error: Unable to find fdb3... under http://repo.or.cz/r/kdebase.git
Cannot obtain needed tree fdb3...
while processing commit 3ce5...

I assume that repo.or.cz has the post hooks properly set up to do 
update-server-info.   Perhaps more is needed?

kdebase.git is the largest tree I could find, so the clone takes a long 
time to complete, and changes are being pushed regularly.

Bryan