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- Drop Python 3.2 support simply because it's dead (reached end of life).
- New argument: ``-m``, ``--merge``. The flag is used to fetch a merge commit
of a given pull request and a branch the pull request is submitted to.
- New argument: ``-C``, ``--no-checkout``. The flag is used to do not
fetch over to fetched pull request and keep this step up to user.