> 0) Does anyone know what the major distributions use as a base for their
> kernel packages: kernel.org tarballs or tarballs created from their copy
> of a git repository? (As far as I know the Fedora kernel packages have a
> tarball as their primary source.)
Well, to answer my own question, if I look at kernel-126.96.36.199-0.fc15.src.rpm (which seems to be the latest kernel pushed for F15) I see it's v.2.6.39 based. And doing a simple md5sum on the copy of linux-2.6.39.tar.bz2 enclosed in that source package shows that is identical to the copy of linux-2.6.39.tar.bz2 I just downloaded for a kernel.org mirror.
Creating bzipped tarballs with identical checksums is rather hard, isn't it? I assume Fedora uses kernel.org tarballs for its packages.
Perhaps someone from the Fedora kernel team could confirm (or deny) that.