$ git clone -n https://src.fedoraproject.org/rpms/mdadm.git /var/lib/mock/f45-build-18179-510/root/chroot_tmpdir/scmroot/mdadm
Cloning into '/var/lib/mock/f45-build-18179-510/root/chroot_tmpdir/scmroot/mdadm'...
$ git fetch origin d6590f17f03b13d32f4bcac4e75937a6f4e7dacf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mdadm
 * [new ref]         d6590f17f03b13d32f4bcac4e75937a6f4e7dacf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d6590f1 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild