I've seen cfetch/1.0 on all my web sites. This bot comes from
38.113.234.180 and
38.113.234.181 IP addresses. It seems to be a crawler for kosmix.com (they send "From: cosmix@cosmixcorp.com" HTTP header and cosmixcorp.com redirects to kosmix.com). They also have another crawler voyager/1.0 that comes from the same IP addresses
http://adminter.net/User-Agent.aspx/voyager.