diff --git a/app_dart/lib/src/model/proto/internal/commit.pb.dart b/app_dart/lib/src/model/proto/internal/commit.pb.dart
index a637509..0a91731 100644
--- a/app_dart/lib/src/model/proto/internal/commit.pb.dart
+++ b/app_dart/lib/src/model/proto/internal/commit.pb.dart
@@ -21,6 +21,7 @@
         ..aOS(4, 'author')
         ..aOS(5, 'authorAvatarUrl', protoName: 'authorAvatarUrl')
         ..aOS(6, 'repository')
+        ..aOS(7, 'branch')
         ..hasRequiredFields = false;
 
   Commit._() : super();
@@ -117,4 +118,16 @@
   $core.bool hasRepository() => $_has(5);
   @$pb.TagNumber(6)
   void clearRepository() => clearField(6);
+
+  @$pb.TagNumber(7)
+  $core.String get branch => $_getSZ(6);
+  @$pb.TagNumber(7)
+  set branch($core.String v) {
+    $_setString(6, v);
+  }
+
+  @$pb.TagNumber(7)
+  $core.bool hasBranch() => $_has(6);
+  @$pb.TagNumber(7)
+  void clearBranch() => clearField(7);
 }
diff --git a/app_dart/lib/src/model/proto/internal/commit.proto b/app_dart/lib/src/model/proto/internal/commit.proto
index b332efa..19ed350 100644
--- a/app_dart/lib/src/model/proto/internal/commit.proto
+++ b/app_dart/lib/src/model/proto/internal/commit.proto
@@ -13,4 +13,5 @@
     optional string author = 4;
     optional string authorAvatarUrl = 5;
     optional string repository = 6;
+    optional string branch = 7;
 }
diff --git a/app_flutter/lib/logic/qualified_task.dart b/app_flutter/lib/logic/qualified_task.dart
index 22e3cdb..b86eb57 100644
--- a/app_flutter/lib/logic/qualified_task.dart
+++ b/app_flutter/lib/logic/qualified_task.dart
@@ -101,7 +101,7 @@
 /// Otherwise, we can redirect to the page that is closest to the logs for [Task].
 String logUrl(Task task, {Commit commit}) {
   if (task.stageName == StageName.cirrus && commit != null) {
-    return '$_cirrusLogUrl/${commit.sha}';
+    return '$_cirrusLogUrl/${commit.sha}?branch=${commit.branch}';
   } else if (QualifiedTask.fromTask(task).isExternal) {
     // Currently this is just LUCI, but is a catch all if new stages are added.
     return QualifiedTask.fromTask(task).sourceConfigurationUrl;
diff --git a/app_flutter/lib/service/appengine_cocoon.dart b/app_flutter/lib/service/appengine_cocoon.dart
index fc72a09..a6610a8 100644
--- a/app_flutter/lib/service/appengine_cocoon.dart
+++ b/app_flutter/lib/service/appengine_cocoon.dart
@@ -369,7 +369,8 @@
       ..sha = commit['Sha']
       ..author = author['Login']
       ..authorAvatarUrl = author['avatar_url']
-      ..repository = checklist['FlutterRepositoryPath'];
+      ..repository = checklist['FlutterRepositoryPath']
+      ..branch = checklist['Branch'];
   }
 
   List<Stage> _stagesFromJson(List<Object> json) {
diff --git a/app_flutter/lib/service/dev_cocoon.dart b/app_flutter/lib/service/dev_cocoon.dart
index 48bb69b..fa0e8bf 100644
--- a/app_flutter/lib/service/dev_cocoon.dart
+++ b/app_flutter/lib/service/dev_cocoon.dart
@@ -123,7 +123,8 @@
       ..authorAvatarUrl = 'https://avatars2.githubusercontent.com/u/${2148558 + author}?v=4'
       ..repository = 'flutter/cocoon'
       ..sha = commitTimestamp.hashCode.toRadixString(16).padLeft(32, '0')
-      ..timestamp = Int64(commitTimestamp);
+      ..timestamp = Int64(commitTimestamp)
+      ..branch = 'master';
   }
 
   static const List<String> _stages = <String>[
diff --git a/app_flutter/test/logic/qualified_task_test.dart b/app_flutter/test/logic/qualified_task_test.dart
index 69e7319..ab4663f 100644
--- a/app_flutter/test/logic/qualified_task_test.dart
+++ b/app_flutter/test/logic/qualified_task_test.dart
@@ -17,7 +17,12 @@
     expect(logUrl(luciTask), 'https://ci.chromium.org/p/flutter/builders/luci.flutter.prod/Mac');
     final Task cirrusTask = Task()..stageName = 'cirrus';
 
-    expect(logUrl(cirrusTask, commit: Commit()..sha = 'abc123'), 'https://cirrus-ci.com/build/flutter/flutter/abc123');
+    expect(
+        logUrl(cirrusTask,
+            commit: Commit()
+              ..sha = 'abc123'
+              ..branch = 'master'),
+        'https://cirrus-ci.com/build/flutter/flutter/abc123?branch=master');
 
     expect(logUrl(cirrusTask), 'https://cirrus-ci.com/github/flutter/flutter/master');
   });
diff --git a/app_flutter/test/service/appengine_cocoon_test.dart b/app_flutter/test/service/appengine_cocoon_test.dart
index fd8dd70..7bd870d 100644
--- a/app_flutter/test/service/appengine_cocoon_test.dart
+++ b/app_flutter/test/service/appengine_cocoon_test.dart
@@ -42,7 +42,8 @@
           ..sha = 'ShaShankHash'
           ..author = 'ShaSha'
           ..authorAvatarUrl = 'https://flutter.dev'
-          ..repository = 'flutter/cocoon')
+          ..repository = 'flutter/cocoon'
+          ..branch = 'master')
         ..stages.add(Stage()
           ..name = 'devicelab'
           ..taskStatus = 'Succeeded'
@@ -146,7 +147,8 @@
           ..sha = 'ShaShankHash'
           ..author = 'ShaSha'
           ..authorAvatarUrl = 'https://flutter.dev'
-          ..repository = 'flutter/cocoon')
+          ..repository = 'flutter/cocoon'
+          ..branch = 'master')
         ..stages.add(Stage()
           ..name = 'chromebot'
           ..taskStatus = 'Succeeded'
diff --git a/app_flutter/test/widgets/task_overlay_test.dart b/app_flutter/test/widgets/task_overlay_test.dart
index 87c465b..3fddd48 100644
--- a/app_flutter/test/widgets/task_overlay_test.dart
+++ b/app_flutter/test/widgets/task_overlay_test.dart
@@ -449,7 +449,7 @@
       log,
       <Matcher>[
         isMethodCall('launch', arguments: <String, Object>{
-          'url': 'https://cirrus-ci.com/build/flutter/flutter/24e8c0a2',
+          'url': 'https://cirrus-ci.com/build/flutter/flutter/24e8c0a2?branch=',
           'useSafariVC': true,
           'useWebView': false,
           'enableJavaScript': false,