$ git clone -n https://src.fedoraproject.org/rpms/xsettingsd.git /var/lib/mock/f45-build-39137-732/root/chroot_tmpdir/scmroot/xsettingsd
Cloning into '/var/lib/mock/f45-build-39137-732/root/chroot_tmpdir/scmroot/xsettingsd'...
$ git fetch origin ed8b5aeebb865bf348676fc5e3c1a61d3180e0d1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xsettingsd
 * [new ref]         ed8b5aeebb865bf348676fc5e3c1a61d3180e0d1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ed8b5ae Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild