$ git clone -n https://src.fedoraproject.org/rpms/kmod.git /var/lib/mock/f42-build-867450-175505/root/chroot_tmpdir/scmroot/kmod
Cloning into '/var/lib/mock/f42-build-867450-175505/root/chroot_tmpdir/scmroot/kmod'...
$ git fetch origin 26240b4bb3f9a4199c4aa8213ce585780bd540a3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kmod
 * [new ref]         26240b4bb3f9a4199c4aa8213ce585780bd540a3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 26240b4 Rebuilt for the bin-sbin merge (2nd attempt)