$ git clone -n https://src.fedoraproject.org/rpms/sgml-common.git /var/lib/mock/f45-build-35855-699/root/chroot_tmpdir/scmroot/sgml-common
Cloning into '/var/lib/mock/f45-build-35855-699/root/chroot_tmpdir/scmroot/sgml-common'...
$ git fetch origin 67ee8776064a81b8fbf9e5992013a1979a3138ce:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sgml-common
 * [new ref]         67ee8776064a81b8fbf9e5992013a1979a3138ce -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 67ee877 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild