git describe orders by date without timezone

[escapewindow]

PREVIOUS_TAG=git describe --abbrev=0

This shows the latest tag, assuming the tags are in the same timezone, or separated by >N hours. But, if

• tag a is created by someone in Europe
• tab b is later created by someone in California, but without 8+ hours of separation,

then git describe orders the European tag first.

We need a better way.

[escapewindow]

The problem might also be git describe looking at the latest revision tagged instead of timestamp. Not entirely sure.

[escapewindow]

This is addressed in the readme: backouts are landing a new commit, then tagging new.