diff --git a/lib/Repository.js b/lib/Repository.js
index de77ae48..2ae7e276 100644
--- a/lib/Repository.js
+++ b/lib/Repository.js
@@ -588,11 +588,9 @@ class Repository extends Requestable {
                if (ref.path === oldPath) {
                   ref.path = newPath;
                }
-               if (ref.type === 'tree') {
-                  delete ref.sha;
-               }
                return ref;
-            });
+            })
+            .filter((ref) => ref.type !== 'tree');
             return this.createTree(newTree);
          })
          .then(({data: tree}) => this.commit(oldSha, tree.sha, `Renamed '${oldPath}' to '${newPath}'`))