$ git clone -n https://src.fedoraproject.org/rpms/xlogo.git /var/lib/mock/f45-build-38929-730/root/chroot_tmpdir/scmroot/xlogo
Cloning into '/var/lib/mock/f45-build-38929-730/root/chroot_tmpdir/scmroot/xlogo'...
$ git fetch origin 0c7a5c9650159bc78029389c082d04c4e38b8ed2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xlogo
 * [new ref]         0c7a5c9650159bc78029389c082d04c4e38b8ed2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0c7a5c9 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild