$ git clone -n https://src.fedoraproject.org/rpms/perl-Parallel-Prefork.git /var/lib/mock/f40-build-2019897-46572/root/chroot_tmpdir/scmroot/perl-Parallel-Prefork
Cloning into '/var/lib/mock/f40-build-2019897-46572/root/chroot_tmpdir/scmroot/perl-Parallel-Prefork'...
$ git fetch origin bd29d0ef0ae6ed841bad4a0eae56c0916d73b4a6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Parallel-Prefork
 * [new ref]         bd29d0ef0ae6ed841bad4a0eae56c0916d73b4a6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bd29d0e Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild