I have a small patch that would make zipapp respect SOURCE_DATE_EPOCH.  This will ensure the zip bundles created by zipapp have consistent hashes regardless of when the source files were last touched.  This idea came to my attention recently when I came across: https://reproducible-builds.org/

I can convert my changes to a PR if it's deemed interesting or useful, but I would like to respect the core maintainers time.  Please let me know if these changes are not desired or not worth while and I'll seek to find somewhere else to put them.

Also, I'm completely new here, so I apologize if there is anything I'm doing against protocol. I didn't find any issues in the tracker pertaining to this, and it seemed small and contained enough to be something I could try out.

Hopefully this issue finds the maintainers well.