if you need new ip when dhcp have lease for you mac address, then you need change your mac

If you need new ip when dhcp have lease or reservation for your mac address, then you need change your mac (if you don't have access to DHCP server).
When you connect host to network with DHCP server, the you get IP:

1. if DHCP server have reservation for mac then you get always the same IP
2. if DHCP server have lease cached for your mac then you get old IP
3. else then you get first available IP