$ git clone -n https://gitee.com/src-opencloudos-rpms/expat.git /var/lib/mock/dist-oc9-build-242936-83059/root/chroot_tmpdir/scmroot/expat
Cloning into '/var/lib/mock/dist-oc9-build-242936-83059/root/chroot_tmpdir/scmroot/expat'...
$ git fetch origin 7ff7bc2ed5f79210df6a8e9a3267a7d5eb9d1082:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/expat
 * [new ref]         7ff7bc2ed5f79210df6a8e9a3267a7d5eb9d1082 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7ff7bc2 import expat-2.6.4-6.tl4