Is your feature request related to a problem? Please describe.
I'm not sure if it's a feature or bug, but the method in lastmod.ts does not fetch file creation date from git. Currently I have to manually supply a frontmatter to every note since the filesystem data is not reliable.

Describe the solution you'd like
This should be doable by using the following:

git log --follow --format=%ad -1 <file>

Describe alternatives you've considered
Maybe use a better library other than simple-git that support this feature.

Additional context
None.