Hello Junio,
Documentation/RelNotes-1.6.2.txt:
> * git-cherry defaults to HEAD when the <upstream> argument is not given.
This is not correct, see commit f2968022 (2008-12-29):
git-cherry: make <upstream> parameter optional
The upstream branch <upstream> now defaults to the first tracked
remote branch, which is set by the configuration variables
branch.<name>.remote and branch.<name>.merge of the current branch. Without such a remote branch, the command "git cherry [-v]" fails with
usage output as before and an additional message.I guess it's a mistake in hurry, not every default value is HEAD :)
Markus