dump out PatchId info

doClean.go

@@ -272,10 +272,39 @@ func checkRemoteBranches(repo *gitpb.Repo) error {
 }
 
 func checkPatchIds(repo *gitpb.Repo, b1 string, b2 string) error {
+	ids := make(map[string]string)
 	s1 := fmt.Sprintf("%s..%s", b1, b2)
 	s2 := fmt.Sprintf("%s..%s", b2, b1)
-	repo.RunVerbose([]string{"git", "rev-list", s1})
+	if stats, err := repo.RunStrict([]string{"git", "rev-list", s1}); err != nil {
-	repo.RunVerbose([]string{"git", "rev-list", s2})
+		return err
+	} else {
+		for _, hash := range stats.Stdout {
+			patchId, err := repo.FindPatchId(hash)
+			if err != nil {
+				continue
+			}
+			ids[patchId] = hash
+		}
+	}
+
+	if stats, err := repo.RunStrict([]string{"git", "rev-list", s2}); err != nil {
+		return err
+	} else {
+		for _, hash := range stats.Stdout {
+			patchId, err := repo.FindPatchId(hash)
+			if err != nil {
+				continue
+			}
+			if _, ok := ids[patchId]; ok {
+				log.Info("already here")
+			} else {
+				ids[patchId] = hash
+			}
+		}
+	}
+	for key, val := range ids {
+		log.Info(key, val)
+	}
 
 	return nil
 }