RFR: 1690: Make jcheck cli able to use conf from workspace or other commit [v3]

Wed Nov 30 19:59:34 UTC 2022

On Wed, 30 Nov 2022 19:56:32 GMT, Zhao Song <zsong at openjdk.org> wrote:

> I'd be more worried about what it might do to my current index or working tree. Is there any chance things could go badly and mess that up?

It will only create a fake `Commit` object but never use git to commit

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PR: https://git.openjdk.org/skara/pull/1428