$ git clone -n https://gitee.com/src-opencloudos-rpms/libxmlb.git /var/lib/mock/dist-oc9-build-42755-14591/root/chroot_tmpdir/scmroot/libxmlb
Cloning into '/var/lib/mock/dist-oc9-build-42755-14591/root/chroot_tmpdir/scmroot/libxmlb'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/libxmlb
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at aa2eba1 import libxmlb-0.3.10-4.tl4