$ git clone -n https://src.fedoraproject.org/rpms/perl-Readonly.git /var/lib/mock/f40-build-2020451-46632/root/chroot_tmpdir/scmroot/perl-Readonly
Cloning into '/var/lib/mock/f40-build-2020451-46632/root/chroot_tmpdir/scmroot/perl-Readonly'...
$ git fetch origin 98edd298a0149f3e4bea3a8f6d3d04e4ec7aa2f0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Readonly
 * [new ref]         98edd298a0149f3e4bea3a8f6d3d04e4ec7aa2f0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 98edd29 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild