$ git clone -n https://gitee.com/src-opencloudos-rpms/mutt.git /var/lib/mock/dist-oc9-build-70854-47480/root/chroot_tmpdir/scmroot/mutt
Cloning into '/var/lib/mock/dist-oc9-build-70854-47480/root/chroot_tmpdir/scmroot/mutt'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/mutt
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ea47c54 import mutt-2.2.9-5.tl4