$ git clone -n https://src.fedoraproject.org/rpms/perl-Data-Flow.git /var/lib/mock/f40-build-2016374-46184/root/chroot_tmpdir/scmroot/perl-Data-Flow
Cloning into '/var/lib/mock/f40-build-2016374-46184/root/chroot_tmpdir/scmroot/perl-Data-Flow'...
$ git fetch origin 23df1aa429cd005dc6d9c5470ffd91047364d42a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Data-Flow
 * [new ref]         23df1aa429cd005dc6d9c5470ffd91047364d42a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 23df1aa Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild