Poor wee thing...
Firstly,..and most importantly,..forget all about Saluki this or that,..for, all things being equal,..his cross-bred lineage frequently means nowt....
He is, simply a frightened and confused young animal....your job,..if you decide to take it,..is to reassure him that if you are around, nothing can harm him.
You have to be the man,..walk tall,..stand in front of anything or anyone that might spook him....protect him,...give him time....
All dogs are different,...I've owned herding breeds that have been raised on remote farms and who are virtually wild animals