Crap, I wish I hadn't erased my Pidora after failing to get VNC working.
Fedora is closer to Redhat/CentOS right? If that's the case, there should have been something in /etc/sysconfig/network-scripts ... like a ifcfg-eth0 file or something. Otherwise you can try just booting to the desktop (init 5, if it's like CentOS) and looking for some control panel tool.
or maybe just search for files under /etc/ that contain your ethernet mac address.