$ git clone -n https://src.fedoraproject.org/rpms/xdemorse.git /var/lib/mock/f45-build-38676-727/root/chroot_tmpdir/scmroot/xdemorse
Cloning into '/var/lib/mock/f45-build-38676-727/root/chroot_tmpdir/scmroot/xdemorse'...
$ git fetch origin 515809532fcc1242ccf20a89d72f9c9fa8156b6a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xdemorse
 * [new ref]         515809532fcc1242ccf20a89d72f9c9fa8156b6a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5158095 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild