$ git clone -n https://src.fedoraproject.org/rpms/perl-Net-IDN-Encode.git /var/lib/mock/f40-build-2221418-52689/root/chroot_tmpdir/scmroot/perl-Net-IDN-Encode
Cloning into '/var/lib/mock/f40-build-2221418-52689/root/chroot_tmpdir/scmroot/perl-Net-IDN-Encode'...
$ git fetch origin 9fbc7994b9cbe639f03ee4ef57ce4dc5c10f4baa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Net-IDN-Encode
 * [new ref]         9fbc7994b9cbe639f03ee4ef57ce4dc5c10f4baa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9fbc799 Modernize a spec file