[AaronFriel]

Could you explain what a git trailer is if not appended to the message body? My understanding is that trailers are just key-value pairs in a particular format at the end of the message; there's not an alternative storage mechanism.

Even so, trailers or message body might be moot - rerolling the committed at timestamp should be sufficient!

[kazinator]

Trailers are part of the commit message, but are separated from the body by a blank linke:

  Subject ...

  Body body body
  body body ...

  Signed-off-by: ...

This is all one commit message, but it is understood by convention has having several parts: subject line, body and trailers.