👷 Get commit message from tag or branch conditionally

Author: shnizzedy

.circleci/config.yml

@@ -84,7 +84,8 @@ commands:
     steps:
       - run:
           name: 📑 Storing commit message
-          command: git log origin/source -1 --oneline --pretty=%s > /home/circleci/GITMESSAGE.txt
+          command: if [[ $CIRCLE_TAG =~ v(.+)(-source) ]]; then git fetch origin --tags; git log ${CIRCLE_TAG} -1 --oneline --pretty=%s > /home/circleci/GITMESSAGE.txt; else git log origin/${CIRCLE_BRANCH} -1 --oneline --pretty=%s > /home/circleci/GITMESSAGE.txt; fi
+
   persist-new-build:
     steps:
       - persist_to_workspace: