BeagleboneBlack changing Mac Address


I wanted to know if it’s possible to change the mac address with the beaglebone black.

I saw that in the U-boot source file, there is something about the SROM :

o If the SROM has a valid MAC address, and there is no address in the
environment, the SROM’s address is used.

So my question is : how can I change the mac address in the SROM ?

And does it work ?