how to fetch again a port from port distribution (ftp site)?

[VeeJay]

Hi

I was trying to install mysql from port collection. But during downloading
port from port distribution, my internet connection got broken for few
minuts...

now when I run make again... it tries to compile uncomplete downloaded src

how can I get rid of this pre-fetched src, remove it and

how to fetch again a port from port distribution (ftp site) when src is
already downloaded once?
-- 
Thanks!

BR / vj