diff --git a/__tests__/git.spec.js b/__tests__/git.spec.js
index 16ba09de..c5ea12ba 100644
--- a/__tests__/git.spec.js
+++ b/__tests__/git.spec.js
@@ -23,6 +23,13 @@ describe('Git', function() {
     );
   });
 
+  it('handles lower case branch options', function() {
+    expectTreeAsync(
+      'git branch banana c0; git commit; git checkout -b side banana; git branch -d banana;git branch -f another c1; git commit',
+      '{"branches":{"master":{"target":"C2","id":"master"},"side":{"target":"C3","id":"side"},"another":{"target":"C1","id":"another"}},"commits":{"C0":{"parents":[],"id":"C0","rootCommit":true},"C1":{"parents":["C0"],"id":"C1"},"C2":{"parents":["C1"],"id":"C2"},"C3":{"parents":["C0"],"id":"C3"}},"HEAD":{"target":"side","id":"HEAD"}}'
+    );
+  });
+
   it('handles branch options', function() {
     expectTreeAsync(
       'git branch banana C0; git commit; git checkout -b side banana; git branch -d banana;git branch -f another C1; git commit',
diff --git a/src/js/git/index.js b/src/js/git/index.js
index 631b7166..eb3005de 100644
--- a/src/js/git/index.js
+++ b/src/js/git/index.js
@@ -1663,6 +1663,10 @@ GitEngine.prototype.resolveStringRef = function(ref) {
   if (this.refs[ref]) {
     return this.refs[ref];
   }
+  // Commit hashes like C4 are case insensitive
+  if (ref.match(/^c\d+$/) && this.refs[ref.toUpperCase()]) {
+    return this.refs[ref.toUpperCase()];
+  }
 
   // Attempt to split ref string into a reference and a string of ~ and ^ modifiers.
   var startRef = null;