message: make github env variable check first as it is new home for ci
diff: @@ -25,10 +25,10 @@ clone() {
  # First we check if GITHUB_HEAD_REF is defined,
  # Then we check if BUILDKITE_BRANCH is defined,
  # if it isn't we can assume this is a Netlify build
  -if [ -n "$BUILDKITE_BRANCH" ]; then
  - head=$BUILDKITE_BRANCH
  -elif [ -n "$GITHUB_HEAD_REF" ]; then
  +if [ -n "$GITHUB_HEAD_REF" ]; then
  head=$GITHUB_HEAD_REF
  +elif [ -n "$BUILDKITE_BRANCH" ]; then
  + head=$BUILDKITE_BRANCH
  else
  # Netlify doesn't give us info about the fork so we have to get it from GitHub API
  apiEndpoint="https://api.github.com/repos/matrix-org/matrix-react-sdk/pulls/"
  