$ git clone -n https://gitee.com/src-opencloudos-rpms/perl-Data-Dumper.git /var/lib/mock/dist-oc9-build-43492-14591/root/chroot_tmpdir/scmroot/perl-Data-Dumper
Cloning into '/var/lib/mock/dist-oc9-build-43492-14591/root/chroot_tmpdir/scmroot/perl-Data-Dumper'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/perl-Data-Dumper
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d02b634 import perl-Data-Dumper-2.183-3.tl4