$ git clone -n https://gitee.com/opencloudos-stream/libxml2.git /var/lib/mock/dist-ocs23-build-41089-2059/root/chroot_tmpdir/scmroot/libxml2
Cloning into '/var/lib/mock/dist-ocs23-build-41089-2059/root/chroot_tmpdir/scmroot/libxml2'...
$ git fetch origin HEAD:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/libxml2
 * [new ref]         HEAD       -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at aeaedf6 !3 downgrade to 2.10.4 due to negative impacts for python-lxml Merge pull request !3 from abushwang/master