[enhancement] support no-remote mode to get commits message #41
Description
Is your feature request related to a problem? Please describe
It is slow for the action to get a lot of commits from Github's api. So I decide to support to get commits message from local repo, which needs to cooperate with action/checkout.
Description of the new feature/enhancement
As above.
Proposed technical implementation details (optional)
Organize the local git log to the same data structure.