Improve current branch determination

bin/update-env

@@ -11,7 +11,7 @@ else
 fi
 if [[ "$CI_COMMIT_REF_NAME" = "" ]]; then
   if [[ -d .git ]]; then
-    PROJECT_BRANCH=$(git rev-parse --abbrev-ref HEAD)
+    PROJECT_BRANCH=$(git branch --show-current)
   else
     PROJECT_BRANCH=develop
   fi