$ git clone -n https://gitee.com/opencloudos-stream/kmag.git /var/lib/mock/dist-oc9-epol-build-92435-59318/root/chroot_tmpdir/scmroot/kmag
Cloning into '/var/lib/mock/dist-oc9-epol-build-92435-59318/root/chroot_tmpdir/scmroot/kmag'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/kmag
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f7aeca0 update