$ git clone -n https://gitee.com/src-opencloudos-rpms/xmlstreambuffer.git /var/lib/mock/dist-oc9-build-63461-16463/root/chroot_tmpdir/scmroot/xmlstreambuffer
Cloning into '/var/lib/mock/dist-oc9-build-63461-16463/root/chroot_tmpdir/scmroot/xmlstreambuffer'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/xmlstreambuffer
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 51d7b85 import xmlstreambuffer-2.1.0-3.tl4