$ git clone -n https://gitee.com/src-opencloudos-rpms/nginx.git /var/lib/mock/dist-oc9-build-70893-47483/root/chroot_tmpdir/scmroot/nginx
Cloning into '/var/lib/mock/dist-oc9-build-70893-47483/root/chroot_tmpdir/scmroot/nginx'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/nginx
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7c7366c Add auto-patch changlog