$ git clone -n https://gitee.com/src-opencloudos-rpms/mailx.git /var/lib/mock/dist-oc9-build-70730-47464/root/chroot_tmpdir/scmroot/mailx
Cloning into '/var/lib/mock/dist-oc9-build-70730-47464/root/chroot_tmpdir/scmroot/mailx'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/mailx
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8e84621 import mailx-12.5-4.tl4