What is "-u" supposed to mean in git-fetch?

Hi,

96b086d6 introduced "-u" to mean "--upload-pack" taking one argument. But 
long ago, b10ac50f1 from Aug 10 already introduced "-u" to mean 
"--update-head-ok" (without argument). This broke my scripts badly.

So, what is it?

Also, in the course of researching this, I tried

	git-whatchanged git-fetch-script

because git-whatchanged does not follow renames. But that did not work, 
because there is no current file of that name! When I created a dummy file 
of that name, git-whatchanged worked real fine! I consider that behaviour 
a bug.

Ciao,
Dscho