$ git clone -n https://src.fedoraproject.org/rpms/php-sebastian-comparator4.git /var/lib/mock/f45-build-28376-629/root/chroot_tmpdir/scmroot/php-sebastian-comparator4
Cloning into '/var/lib/mock/f45-build-28376-629/root/chroot_tmpdir/scmroot/php-sebastian-comparator4'...
$ git fetch origin 21393b1260dab14321c69bf049c807d149041767:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/php-sebastian-comparator4
 * [new ref]         21393b1260dab14321c69bf049c807d149041767 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 21393b1 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild