$ git clone -n https://src.fedoraproject.org/rpms/php-sebastian-comparator6.git /var/lib/mock/f45-build-28281-629/root/chroot_tmpdir/scmroot/php-sebastian-comparator6
Cloning into '/var/lib/mock/f45-build-28281-629/root/chroot_tmpdir/scmroot/php-sebastian-comparator6'...
$ git fetch origin d56e6f06bcb0338f46078ecd280924a201d65b46:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/php-sebastian-comparator6
 * [new ref]         d56e6f06bcb0338f46078ecd280924a201d65b46 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d56e6f0 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild