fetch only what we want

Author: josecorella

codebuild/release/prod-release.yml

@@ -14,6 +14,7 @@ phases:
   build:
     commands:
       - pip install tox
+      - git fetch origin $BRANCH:$BRANCH --depth=1;
       - git checkout $BRANCH
       - tox -e park
       - tox -e release

codebuild/release/test-release.yml

@@ -14,6 +14,7 @@ phases:
   build:
     commands:
       - pip install tox
+      - git fetch origin $BRANCH:$BRANCH --depth=1;
       - git checkout $BRANCH
       - tox -e park
       - tox -e test-release