$ git clone -n https://gitee.com/src-opencloudos-rpms/perl-JSON.git /var/lib/mock/dist-oc9-build-59994-16463/root/chroot_tmpdir/scmroot/perl-JSON
Cloning into '/var/lib/mock/dist-oc9-build-59994-16463/root/chroot_tmpdir/scmroot/perl-JSON'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/perl-JSON
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3dc8806 import perl-JSON-4.10-2.tl4