Re: warning: no common commits - slow pull

* Len Brown:

But this second pull seems to have re-downloaded 172MB,
when it should have only needed the last few commits.

I've got a linux-2.6 tree which is reasonable up to date, but which has
been created by some acient GIT version.  I see the same behavior from
time to time.  The second pull, after I've canceled the first one,
usually downloads just the expected data.