Fugitive comes with a pretty sick way to commit files and see the diff at the
same time with verbose commit. Opening the fugitive menu with :G brings up
your git status, you can stage files with s, unstage them with u, toggle
them with -, and toggle their diff with >. Once you have staged your files
for commit, you can commit with cc, but today I found that you can commit
verbose with cvc. This brings up not only a commit widow with your git
status shown, but the diff that you are about to commit.
example of a verbose commit in fugitive