Resolving maven dependencies

On the dependecy plugin documentation you can read that dependency:list is an alias for dependency:resolve. What you need is dependency:tree which :

Displays the dependency tree for this project.

Even with dependency:tree you will have to download dependencies.

From Arnaud Héritier (developer on Maven Project)

This is a problem in maven core which doesn't allow in 2.x to resolve dependencies without downloading artifacts.