$ git clone -n https://gitee.com/src-opencloudos-rpms/libxml2.git /var/lib/mock/dist-oc8-build-248184-83667/root/chroot_tmpdir/scmroot/libxml2
Cloning into '/var/lib/mock/dist-oc8-build-248184-83667/root/chroot_tmpdir/scmroot/libxml2'...
$ git fetch origin f469ea8facb25cdd48cd062c4434a87ff6def289:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/libxml2
 * [new ref]         f469ea8facb25cdd48cd062c4434a87ff6def289 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f469ea8 import libxml2-2.9.7-21.tl3.7