IMAGE_TAG should not be determined directly from the branch name

Currently, IMAGE_TAG: "$CI_MERGE_REQUEST_SOURCE_BRANCH_NAME", and decide whether to create a new image for MR based on CREATE_NEW_CONTAINER=$(docker manifest inspect $CONTAINER_IMAGE:$IMAGE_TAG > /dev/null ; echo $?), but this will cause a problem: If the branch name deleted, and then created again, if the dependencies in the two branches are different, obviously no new image will be built for the new dependencies.