$ git clone -n https://gitee.com/src-opencloudos-rpms/libxcb /var/lib/mock/dist-oc9-build-66950-17445/root/chroot_tmpdir/scmroot/libxcb
Cloning into '/var/lib/mock/dist-oc9-build-66950-17445/root/chroot_tmpdir/scmroot/libxcb'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/libxcb
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 812241f import libxcb-1.14-4.tl4