$ git clone -n https://src.fedoraproject.org/rpms/python-blivet.git /var/lib/mock/f40-build-797585-141407/root/chroot_tmpdir/scmroot/python-blivet
Cloning into '/var/lib/mock/f40-build-797585-141407/root/chroot_tmpdir/scmroot/python-blivet'...
$ git fetch origin 3aa1b51e8886f8489423bb98f086dcd9d84795a7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-blivet
 * [new ref]         3aa1b51e8886f8489423bb98f086dcd9d84795a7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3aa1b51 Fix scanning partitions on RAID arrays (#2269133)