$ git clone -n https://src.fedoraproject.org/rpms/buildbot.git /var/lib/mock/f40-build-2431613-60639/root/chroot_tmpdir/scmroot/buildbot
Cloning into '/var/lib/mock/f40-build-2431613-60639/root/chroot_tmpdir/scmroot/buildbot'...
$ git fetch origin 5b586580b392316daec2d29ece04dc32c565358f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/buildbot
 * [new ref]         5b586580b392316daec2d29ece04dc32c565358f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5b58658 Fix database upgrade action