--force

  script:

    - echo "[${GIT_PULL_REPO}#${GIT_PULL_BRANCH:-master}] -> [${GIT_PUSH_REPO}#${GIT_PUSH_BRANCH:-master}]"

    - rm -rf /tmp/repo

    - git clone "${GIT_PUSH_REPO}" /tmp/repo

    - git clone "${GIT_PULL_REPO}" -b "${GIT_PULL_BRANCH:-master}" /tmp/repo

    - cd /tmp/repo

    - git checkout "${GIT_PUSH_BRANCH:-master}"

    - git remote add upstream "${GIT_PULL_REPO}"

    - test -n "${GIT_TAGS}" && git fetch upstream --tags || true

    - git pull --ff-only upstream "${GIT_PULL_BRANCH:-master}"

    - git push --force origin "${GIT_PUSH_BRANCH:-master}"

    - test -n "${GIT_TAGS}" && git push --force origin --tags || true

    - test -n "${GIT_TAGS}" && git fetch --tags || true

    - git remote add downstream "${GIT_PUSH_REPO}"

    - git push --force downstream "${GIT_PUSH_BRANCH:-master}"

    - test -n "${GIT_TAGS}" && git push --force downstream --tags || true