$ cat patch.yaml
$ oc patch scc restricted -p "$(cat patch.yaml)" --type=merge
However, with move of SCC to CRD recently, edit might be broken, investigating.
Related thread, for reference: http://post-office.corp.redhat.com/archives/aos-devel/2019-May/msg00547.html
CRs will not get support for strategic merge patch. We cannot fix it this way. Why does oc user smp in the first place for this CRD? Moving to oc.