diff --git a/sync.bat b/sync.bat
index 57192ac..169f049 100644
--- a/sync.bat
+++ b/sync.bat
@@ -31,6 +31,8 @@ if not exist "webrtc" (
 
 echo Updating WebRTC to version %WEBRTC_REVISION%...
 cd %REPO_ROOT%\webrtc\src
+call gclient sync --with_branch_heads
+git.exe fetch
 git.exe checkout -B %WEBRTC_REVISION% branch-heads/%WEBRTC_REVISION%
 call gclient sync --force -D
 
diff --git a/sync.sh b/sync.sh
index 29e6647..4d57bb2 100755
--- a/sync.sh
+++ b/sync.sh
@@ -35,5 +35,7 @@ fi
 
 echo "Updating WebRTC to version ${WEBRTC_REVISION}..."
 cd ${REPO_ROOT}/webrtc/src
+gclient sync --with_branch_heads
+git fetch
 git checkout -B ${WEBRTC_REVISION} branch-heads/${WEBRTC_REVISION}
 gclient sync --force -D