Very rarely. But it can come up if you archive change history in git for things that aren't originally tracked in git.

Take laws for example. Legalize[1] is a project that documents all laws into a git structure where each distinct change is a commit with the proper timestamp of tha change. Sure, this specific project builds that entire git history once and it's unlikely a retroactive change required such edits. But do something like this for historical sources where information is still coming in, and you might need to change a date when new findings occur.

[1] https://github.com/legalize-dev/legalize