$ git clone -n https://src.fedoraproject.org/rpms/perl-Test-CPAN-Meta-JSON.git /var/lib/mock/f45-build-26582-618/root/chroot_tmpdir/scmroot/perl-Test-CPAN-Meta-JSON
Cloning into '/var/lib/mock/f45-build-26582-618/root/chroot_tmpdir/scmroot/perl-Test-CPAN-Meta-JSON'...
$ git fetch origin 598fdec45a8c434781d50d61ff475ab217e8f4ba:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test-CPAN-Meta-JSON
 * [new ref]         598fdec45a8c434781d50d61ff475ab217e8f4ba -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 598fdec Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild