Loading a Snapshot from a Workspace

Here's a newbie question about snapshots:

I have access to a public repository workspace that contains snapshots for each build that was made. I want to load a particular snapshot in that workspace into my local workspace, using the command line scm command (I can't use the Eclipse client on this system).

I can't find any way to specify a snapshot when doing a load. Without being able to load a particular snapshot, then what good is a snapshot? Am I just missing something? Or can the snapshots only be accessed via the Eclipse client?