$ git clone -n https://gitee.com/src-opencloudos-rpms/libxml2.git /var/lib/mock/dist-oc9-build-124339-73892/root/chroot_tmpdir/scmroot/libxml2
Cloning into '/var/lib/mock/dist-oc9-build-124339-73892/root/chroot_tmpdir/scmroot/libxml2'...
$ git fetch origin 91313b2652ef775f3fafcfcdbe8e6df99dd98bf3:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/libxml2
 * [new ref]         91313b2652ef775f3fafcfcdbe8e6df99dd98bf3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 91313b2 import libxml2-2.11.5-6.tl4