$ git clone -n https://gitee.com/src-opencloudos-rpms/double-conversion.git /var/lib/mock/dist-oc9-build-46025-14592/root/chroot_tmpdir/scmroot/double-conversion
Cloning into '/var/lib/mock/dist-oc9-build-46025-14592/root/chroot_tmpdir/scmroot/double-conversion'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/double-conversion
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at de660da import double-conversion-3.1.5-3.tl4