diff --git a/.devcontainer/setup-app.sh b/.devcontainer/setup-app.sh
index f3b404aec..525c8861b 100644
--- a/.devcontainer/setup-app.sh
+++ b/.devcontainer/setup-app.sh
@@ -9,4 +9,4 @@ bundle exec rake assets:copy
 if [ ! -f .htpasswd ]; then
 	bundle exec bin/tdiary htpasswd
 fi
-git fetch
+git ls-remote -q > /dev/null