It is possible to method to mimic symlink behavior by having an apache configuration?

For instance, from /var/www/someFolder/ I have to reference files in /var/www/anotherFolder/ but get it done without needing relative pathways (because I am using subdomains) or absolute pathways.

Note: Symlinks work however they don't deploy well from git and from the demo site. I'd think an apache configuration is a lot more deployable then a large number of symlinks

It is possible to way? With htaccess? With ServerAlias? etc...

Basically understood your question properly then following code inside your .htaccess should work fine:

Options +FollowSymlinks -MultiViews
RewriteEngine on

RewriteRule ^someFolder/(.*)$ anotherFolder/$1 [L,NC]

By doing this a URI of http://domain.com/somefolder is going to be internally referencing files from /anotherFolder/ folder this provides you with an effect of symlink without creating a real symlink.