! For a list of files to be pushed

{{{
$ git diff --stat [remote/branch]
}}}

Example: 

{{{
$ git diff --stat origin/master
}}}

! For the code diff of the files to be pushed

{{{
$ git diff [remote/branch]
}}}

Example:

{{{
$ git diff origin/master
}}}

! To just show names/status

{{{
$ git diff --name-status [remote/branch]
}}}

Example

{{{
$ git diff --name-status origin/master
}}}

See [http://stackoverflow.com/questions/3636914/how-can-you-see-what-you-are-about-to-push-with-git] for further discussion.

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[Git|CategoryComputing.SCM.Git]