$ git clone -n https://gitee.com/src-opencloudos-rpms/expat.git /var/lib/mock/dist-oc8-build-249000-83755/root/chroot_tmpdir/scmroot/expat
Cloning into '/var/lib/mock/dist-oc8-build-249000-83755/root/chroot_tmpdir/scmroot/expat'...
$ git fetch origin 52786abffdd5ddcd19c1c99b8b5acc7ae9f69438:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/expat
 * [new ref]         52786abffdd5ddcd19c1c99b8b5acc7ae9f69438 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 52786ab import expat-2.5.0-2.tl3.2