$ git clone -n https://src.fedoraproject.org/rpms/hmat-oss.git /var/lib/mock/f45-build-13469-451/root/chroot_tmpdir/scmroot/hmat-oss
Cloning into '/var/lib/mock/f45-build-13469-451/root/chroot_tmpdir/scmroot/hmat-oss'...
$ git fetch origin a2b126f3b43b717bdd78485ff2f0999b1854e2d4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/hmat-oss
 * [new ref]         a2b126f3b43b717bdd78485ff2f0999b1854e2d4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a2b126f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild