$ git clone -n https://gitee.com/src-opencloudos-rpms/perl-Net-DNS.git /var/lib/mock/dist-oc9-build-43759-14591/root/chroot_tmpdir/scmroot/perl-Net-DNS
Cloning into '/var/lib/mock/dist-oc9-build-43759-14591/root/chroot_tmpdir/scmroot/perl-Net-DNS'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/perl-Net-DNS
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1be27fd import perl-Net-DNS-1.34-3.tl4