$ git clone -n https://src.fedoraproject.org/rpms/xlockmore.git /var/lib/mock/f45-build-38901-730/root/chroot_tmpdir/scmroot/xlockmore
Cloning into '/var/lib/mock/f45-build-38901-730/root/chroot_tmpdir/scmroot/xlockmore'...
$ git fetch origin 5b2f604c1d0fb34cb494d0980d40f4cad16ddc51:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xlockmore
 * [new ref]         5b2f604c1d0fb34cb494d0980d40f4cad16ddc51 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5b2f604 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild