$ git clone -n https://gitee.com/src-opencloudos-rpms/libxml2.git /var/lib/mock/dist-oc8-build-124113-73708/root/chroot_tmpdir/scmroot/libxml2
Cloning into '/var/lib/mock/dist-oc8-build-124113-73708/root/chroot_tmpdir/scmroot/libxml2'...
$ git fetch origin df523ccc8822a2a7c82c91a358ad2b82cc4fb009:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/libxml2
 * [new ref]         df523ccc8822a2a7c82c91a358ad2b82cc4fb009 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at df523cc import libxml2-2.9.7-18.tl3.2