$ git clone -n https://gitee.com/src-opencloudos-rpms/libmng.git /var/lib/mock/dist-oc9-build-42333-14591/root/chroot_tmpdir/scmroot/libmng
Cloning into '/var/lib/mock/dist-oc9-build-42333-14591/root/chroot_tmpdir/scmroot/libmng'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/libmng
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0efe6f8 import libmng-2.0.3-3.tl4