$ git clone -n https://gitee.com/src-opencloudos-rpms/libxml2.git /var/lib/mock/dist-oc9-build-124705-74302/root/chroot_tmpdir/scmroot/libxml2
Cloning into '/var/lib/mock/dist-oc9-build-124705-74302/root/chroot_tmpdir/scmroot/libxml2'...
$ git fetch origin 267bff858234e6a2ff6e89e4b9d8ae1b8d0eebab:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/libxml2
 * [new ref]         267bff858234e6a2ff6e89e4b9d8ae1b8d0eebab -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 267bff8 import libxml2-2.11.5-7.tl4