diff --git a/__tests__/git.spec.js b/__tests__/git.spec.js
index c5ea12ba..25f55f96 100644
--- a/__tests__/git.spec.js
+++ b/__tests__/git.spec.js
@@ -114,6 +114,13 @@ describe('Git', function() {
     );
   });
 
+  it('Branches lowercase', function() {
+    expectTreeAsync(
+      'git branch side c0',
+      '{"branches":{"master":{"target":"C1","id":"master"},"side":{"target":"C0","id":"side"}},"commits":{"C0":{"parents":[],"id":"C0","rootCommit":true},"C1":{"parents":["C0"],"id":"C1"}},"HEAD":{"target":"master","id":"HEAD"}}'
+    );
+  });
+
   it('Deletes branches', function() {
     expectTreeAsync(
       'git branch side; git branch -d side',
diff --git a/src/js/git/index.js b/src/js/git/index.js
index eb3005de..f0188246 100644
--- a/src/js/git/index.js
+++ b/src/js/git/index.js
@@ -1664,7 +1664,7 @@ GitEngine.prototype.resolveStringRef = function(ref) {
     return this.refs[ref];
   }
   // Commit hashes like C4 are case insensitive
-  if (ref.match(/^c\d+$/) && this.refs[ref.toUpperCase()]) {
+  if (ref.match(/^c\d+'*/) && this.refs[ref.toUpperCase()]) {
     return this.refs[ref.toUpperCase()];
   }