storing cover letter of a patch series?

Hey,

does anyone know of any tricks for storing a cover letter for a patch series inside of git somehow? I'd guess the only obvious way currently is to store it at the top of the series as an empty commit.. but this doesn't get emailed *as* the cover letter...

Is there some other way? Would others be interested in such a feature?

I get very annoyed when I've written a nice long patch cover letter in vim before an email and then realize I should fix something else up, or accidentally cancel it because I didn't use the write "To:" address or something..

I really think it should be possible to store something somehow as a blob that could be looked up later. Even if this was a slightly more manual process that would be helpful to store the message inside git itself.

In addition, this would help re-rolls since it would mean if I go back to a topic and re-roll it I can just update the message. If it were properly stored in my local history that would also mean I could see revisions on it.

Any thoughts on how to do this?

Regards, Jake