[feature] VCS datetime Tokens

[matray]

Is your feature request related to a problem? Please describe.

Tokens for timestamps from VCS for reproducible builds with meaningful metadata.

Describe the solution you'd like

Tokens are super useful to leverage metadata in build tasks. However, the existing date/time tokens don't allow for reproducible building. As moon already hooks in to the configured VCS, it would be nice to expose timestamps that are VCS-intelligent, like commit timestamps. This allows build tasks to be reproducible and potentially more cache-able.

To preserve the potentially useful for other reasons dateTime tokens, perhaps these are exposed with the prefix of vcs. e.g. vcsDatetime, vcsDate, vcsTime, vcsTimestamp

Describe alternatives you've considered

Right now we just leverage script blocks in commands to extract this metadata ourselves. Directly going to git works, but it's not as nice as grabbing metadata from the project.

[matray]

This might be an extension of #1639, I see mentioned that token layer has no VCS intelligence at the current point in time.

[matray]

Oh nice! I see there's already some progress on that front coming in 1.30, incredible #1718

[milesj]

v1.30 is out, is $vcsRevision enough here?