$ git clone -n https://src.fedoraproject.org/rpms/xeus.git /var/lib/mock/f45-build-38766-728/root/chroot_tmpdir/scmroot/xeus
Cloning into '/var/lib/mock/f45-build-38766-728/root/chroot_tmpdir/scmroot/xeus'...
$ git fetch origin 14b64b75af4505ef2de2e0d6d8ec73c5f1b20d46:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xeus
 * [new ref]         14b64b75af4505ef2de2e0d6d8ec73c5f1b20d46 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 14b64b7 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild