diff --git a/examples/user-repositories-branches-async.php b/examples/user-repositories-branches-async.php
index e9cbcd2af5..e14a20f691 100644
--- a/examples/user-repositories-branches-async.php
+++ b/examples/user-repositories-branches-async.php
@@ -4,6 +4,7 @@
 use ApiClients\Client\Github\Resource\Async\User;
 use function ApiClients\Foundation\resource_pretty_print;
 use React\EventLoop\Factory;
+use function React\Promise\all;
 
 require \dirname(__DIR__) . \DIRECTORY_SEPARATOR . 'vendor/autoload.php';
 
@@ -21,6 +22,18 @@
         resource_pretty_print($branch, 2, true);
         $branch->detailedCommit()->then(function (Repository\Commit $commit) {
             resource_pretty_print($commit);
+
+            $promises = [];
+            foreach ($commit->parents() as $parent) {
+                $promises[] = $parent->detailedCommit();
+            }
+
+            return all($promises);
+        })->then(function ($commits) {
+            /** @var Repository\Commit $commit */
+            foreach ($commits as $commit) {
+                resource_pretty_print($commit);
+            }
         })->done(null, 'display_throwable');
     }, function ($error) {
         echo (string)$error;
diff --git a/src/Resource/Async/Tree.php b/src/Resource/Async/Tree.php
index 8a4430989a..8ba1aca831 100644
--- a/src/Resource/Async/Tree.php
+++ b/src/Resource/Async/Tree.php
@@ -2,7 +2,9 @@
 
 namespace ApiClients\Client\Github\Resource\Async;
 
+use ApiClients\Client\Github\CommandBus\Command\Repository\DetailedCommitCommand;
 use ApiClients\Client\Github\Resource\Tree as BaseTree;
+use React\Promise\PromiseInterface;
 
 class Tree extends BaseTree
 {
@@ -10,4 +12,12 @@ public function refresh(): Tree
     {
         throw new \Exception('TODO: create refresh method!');
     }
+
+    public function detailedCommit(): PromiseInterface
+    {
+        return $this->handleCommand(new DetailedCommitCommand(
+            \str_replace('/commits/' . $this->sha, '', \explode('/repos/', $this->url)[1]),
+            $this->sha
+        ));
+    }
 }
diff --git a/src/Resource/Repository/Commit.php b/src/Resource/Repository/Commit.php
index 5c41b5a1da..28d93d9c88 100644
--- a/src/Resource/Repository/Commit.php
+++ b/src/Resource/Repository/Commit.php
@@ -9,6 +9,8 @@
 use ApiClients\Foundation\Hydrator\Annotation\EmptyResource;
 use ApiClients\Foundation\Hydrator\Annotation\Nested;
 use ApiClients\Foundation\Resource\AbstractResource;
+use Rx\Observable;
+use function ApiClients\Tools\Rx\observableFromArray;
 
 /**
  * @Collection(
@@ -107,9 +109,9 @@ public function comitter(): UserInterface
     }
 
     /**
-     * @return TreeInterface
+     * @return TreeInterface[]
      */
-    public function parents(): TreeInterface
+    public function parents(): array
     {
         return $this->parents;
     }
diff --git a/src/Resource/Repository/CommitInterface.php b/src/Resource/Repository/CommitInterface.php
index 76d7c85925..b9556503ea 100644
--- a/src/Resource/Repository/CommitInterface.php
+++ b/src/Resource/Repository/CommitInterface.php
@@ -42,7 +42,7 @@ public function author(): UserInterface;
     public function comitter(): UserInterface;
 
     /**
-     * @return TreeInterface
+     * @return TreeInterface[]
      */
-    public function parents(): TreeInterface;
+    public function parents(): array;
 }