$ git clone -n https://gitee.com/src-opencloudos-rpms/expat.git /var/lib/mock/dist-oc9-build-251951-84157/root/chroot_tmpdir/scmroot/expat
Cloning into '/var/lib/mock/dist-oc9-build-251951-84157/root/chroot_tmpdir/scmroot/expat'...
$ git fetch origin c37291a39566b2a81c947590bd134a0c1f906d76:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/expat
 * [new ref]         c37291a39566b2a81c947590bd134a0c1f906d76 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c37291a import expat-2.6.4-11.tl4