diff --git a/doClean.go b/doClean.go
index adeac89..8b6f057 100644
--- a/doClean.go
+++ b/doClean.go
@@ -59,7 +59,7 @@ func doCleanDevel() error {
 	for all.Scan() {
 		repo := all.Next()
 		if argv.Verbose {
-			log.Info("Cleaning:", repo.GetGoPath())
+			// log.Info("Cleaning:", repo.GetGoPath())
 		}
 		total += 1
 		if repo.GetCurrentBranchName() != repo.GetDevelBranchName() {
@@ -79,17 +79,55 @@ func doCleanDevel() error {
 	return nil
 }
 
+func exactDevelRepo(repo *gitpb.Repo) error {
+	devel := repo.GetDevelBranchName()
+	master := repo.GetMasterBranchName()
+	err := isBranchSubsetOfTrunk(repo, devel, master)
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func checkhashes(repo *gitpb.Repo, hashes []string, refpath string) ([]string, error) {
+	if !repo.Exists(refpath) {
+		return hashes, nil
+	}
+	r, err := repo.RunStrictNew([]string{"cat", refpath})
+	if err != nil {
+		return hashes, err
+	}
+	newhash := r.Stdout[0]
+	for _, hash := range hashes {
+		if newhash != hash {
+			return hashes, fmt.Errorf("%s hash broke %s %s", repo.GetGoPath(), newhash, hash)
+		}
+	}
+	hashes = append(hashes, newhash)
+	return hashes, nil
+}
+
 func doCleanDevelRepo(repo *gitpb.Repo) error {
+	var hashes []string
 	devel := repo.GetDevelBranchName()
 	// log.Printf("%s Start verify devel branch: %s\n", repo.GetGoPath(), devel)
 
 	// check if devel branch exists in remote repo
 	if repo.Exists(filepath.Join(".git/refs/remotes/origin", devel)) {
+		if argv.Verbose {
+			var err error
+			if hashes, err = checkhashes(repo, hashes, filepath.Join(".git/refs/remotes/origin", devel)); err != nil {
+				return err
+			}
+		}
 		remote := filepath.Join("origin", devel)
 		if err := isBranchSubsetOfTrunk(repo, devel, remote); err != nil {
 			if err == ErrorMergeBranch {
 				log.Info("can not do this yet. need push to upstream", repo.GetGoPath())
-				return nil
+				if argv.Force {
+					return nil
+				}
+				return err
 			}
 			return err
 		}
@@ -98,6 +136,21 @@ func doCleanDevelRepo(repo *gitpb.Repo) error {
 
 	// verify devel branch is subset of master branch
 	master := repo.GetMasterBranchName()
+	if argv.Verbose {
+		var err error
+		if hashes, err = checkhashes(repo, hashes, filepath.Join(".git/refs/heads", devel)); err != nil {
+			return err
+		}
+	}
+	if argv.Verbose {
+		var err error
+		if hashes, err = checkhashes(repo, hashes, filepath.Join(".git/refs/heads", devel)); err != nil {
+			return err
+		}
+	}
+	if argv.Verbose {
+		log.Info("repo hashes all match. incredible", hashes, repo.GetGoPath())
+	}
 	if err := isBranchSubsetOfTrunk(repo, devel, master); err != nil {
 		if err == ErrorMergeBranch {
 			if argv.Force {
@@ -110,8 +163,9 @@ func doCleanDevelRepo(repo *gitpb.Repo) error {
 					cmd := []string{"git", "merge", master}
 					log.Info("can't run. on wrong branch.", cmd, repo.GetGoPath(), "current branch =", repo.GetCurrentBranchName())
 				}
+				return nil
 			}
-			return nil
+			return err
 		}
 		return err
 	}