$ git clone -n https://gitee.com/opencloudos-stream/rubygem-xml-simple.git /var/lib/mock/dist-oc9-epol-build-96137-59766/root/chroot_tmpdir/scmroot/rubygem-xml-simple
Cloning into '/var/lib/mock/dist-oc9-epol-build-96137-59766/root/chroot_tmpdir/scmroot/rubygem-xml-simple'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/rubygem-xml-simple
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0736e95 update