diff --git a/Dockerfile b/Dockerfile
index f27052de..baabc5be 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -7,6 +7,7 @@ RUN apt-get update
 RUN apt-get install -y git
 RUN rm -rf /var/lib/apt/lists/*
 RUN npm install
+RUN echo $GIT_BRANCH
 ENV GIT_BRANCH=$GIT_BRANCH
 ENV GIT_COMMIT=$GIT_COMMIT
 RUN git clone -n https://github.com/wukko/cobalt.git --depth 1 && mv cobalt/.git ./ && rm -rf cobalt