Question about DeterministicAssetBundle

With BuildAssetBundleOptions.DeterministicAssetBundle,we can get a same AB when rebuild it.This is a very
import thing.For we can use SVN or MD5 to judge whether the AB is changed.(then player can download it with WWW).
But in the doc,it said that
" Due to it being a 32 bit hash space, if you have a lot of objects in the asset bundle it will increase the potential for hash conflicts"
"The hash is based on the GUID of the asset and the local id of the object in the asset"

So questions:
.Has somebody know the algorithm of the GUID?Building AB with different Unity projects(different tools),is there some risk to error?
.If the conflicts happen easily?When happend,how to fix it?

 

I'm hitting hash ID conflicts with our bundle building process as well, with not that many assets honestly...

I'd like to know what hash routine your using and if there is a way for me to bypass or or provide my own hash ID's.