fix(governctl): Add unknown commits as exception

Because of how governctl structures temp repos it makes it
impossible for checkpatch to look behind and check if a
commit in a body is referenced correctly. This is fine.
It can be checked by hand with the script and can also
be observed in GitHub if the sha mentioned is invalid.

Signed-off-by: Cezar Craciunoiu <[email protected]>

cmd/governctl/pr/check/patch.go

@@ -66,7 +66,7 @@ func NewPatch() *cobra.Command {
 }
 
 func (opts *Patch) Run(ctx context.Context, args []string) error {
-	var extraIgnores []string
+	var extraIgnores = []string{"UNKNOWN_COMMIT_ID"}
 
 	ghOrg, ghRepo, ghPrId, err := cmdutils.ParseOrgRepoAndPullRequestArgs(args)
 	if err != nil {