New issue by classabbyamp on void-packages repository

https://github.com/void-linux/void-packages/issues/25343

Description:
I am working on packaging `chezmoi` for void, and the project maintainer requests that the git commit hash be added as a linker flag (see [here](https://github.com/twpayne/chezmoi/blob/master/docs/CONTRIBUTING.md#packaging)).

Is there a preferred way to do this in the template, other than hard-coding it?