git committish for 1 year ago

[Graham Percival]

The command for 3 months ago is happy, but not the one for a year:

~/src/lilypond$ git rev-parse "origin/address@hidden months ago}"
95fab3ca9692b197c2a26c5249d7f30b114ab451

~/src/lilypond$ git rev-parse "origin/address@hidden year ago}" 
warning: Log for 'origin/master' only goes back to Mon, 29 Aug
2011 02:08:20 +0100.


Does anybody know why?  I tried checking out a fresh repo, and
that only went back to today.  But when I look at git log or gitk,
I can see the full history.

Cheers,
- Graham