Update hook in Cygwin

Hi.

After creating a couple of repositories and pushing and cloning them,
I get the following:

$ git push --all origin
...
hooks/update: line 88: mail: command not found

This is in cygwin. I'm rather glad I don't have the mail command
installed, as I don't want mails going anywhere.

The update hook contains the following comment:

# To enable this hook:
# (1) change the recipient e-mail address
# (2) make this file executable by "chmod +x update".

But my impression after a cursory look at it is that it would always
call "mail" whenever it is run, and since all files are executable in
Windows (AFAIK), it would always be run.