Make physics rotate around bottom of mesh

Hello, I’m trying to enable physics on a log and make it tip over from the bottom. I am putting constraints on the object to prevent it from moving away. I want the log to rotate around the bottom. However, no matter what I do, it only rotates from the middle of the log. Any help?

You need to change the pivot of the log.

You can do this in modeling tool like max or maya.

Or you can buy pivot tool on marketplace