*sh: reassign `r` alias to `git refresh`
*sh: reassign `r` alias to `git refresh`

Now that the old use of `r` is no more, we're free to use it for `git
refresh`, which is a more natural fit anyway.

Signed-off-by: Wincent Colaiuta <c76ac2e9cd86441713c7dfae92c451f3e6d17fdc@wincent.com>

wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent