diff --git a/lib/backport_session.js b/lib/backport_session.js
index f45a86f8..849f787c 100644
--- a/lib/backport_session.js
+++ b/lib/backport_session.js
@@ -39,7 +39,7 @@ export default class BackportSession extends Session {
 
   getCommitMessage(rev) {
     return runSync('git',
-      ['show', '--format=%B', rev]
+      ['show', '--format=%B', '-s', rev]
     ).trim();
   }