Clone without --depth 1

The background for this change was discussed on the HardenedBSD
irc channel. It is known to cause issues with pull later on,
due to hardware constraints on git.hardenedbsd.org.

bin/portzap

@@ -73,7 +73,7 @@ clone() {
             exit 1
         fi
         umask $clone_mask
-        git clone --depth 1 $ports_url $portzap_dir
+        git clone $ports_url $portzap_dir
     else
         echo "Permission denied."
     fi