how to check what your pulling down?

Hi

I've been using basic git for a while (add,comit,push,pull) and have recently discovered stash,merge,branch :)

My question: before I pull down I always get that bad feeling... "what am i gunna get? will there be a conflict?". Is there a git command to check what will come down with the next pull? If not, a command that will tell you which local files differ from the git repository files?

Thanks