$ git clone -n https://src.fedoraproject.org/rpms/hyperhdr.git /var/lib/mock/f40-build-800835-143643/root/chroot_tmpdir/scmroot/hyperhdr
Cloning into '/var/lib/mock/f40-build-800835-143643/root/chroot_tmpdir/scmroot/hyperhdr'...
$ git fetch origin d6dfdbd14a9a597275d709cb40957175a6de76d8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/hyperhdr
 * [new ref]         d6dfdbd14a9a597275d709cb40957175a6de76d8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d6dfdbd Rebuilt for turbojpeg 3.0.2