How can I limit git-diff to one directory only, without its children?

I'm using git diff --name-status to track which files have been modified/added/removed/renamed/copied between two commits, and it works great.

Now suppose I move file file1 to newdir/file1, commit, and then run git diff, I get this:

$ git diff --name-status -C HEAD~1 HEAD
R100    file1    newdir/file1

Is there a way to ask git to limit itself to the list of changes inside a given directory but not its children? I'd like to know the exact changes both for the root directory and for the newdirdirectory, separately. For newdir, it's easy:

$ git diff --name-status -C HEAD~1 HEAD -- newdir
A       newdir/file1

… but how can I obtain the "complementary" diff info in the root directory? I.e., this output:

$ git diff ???
D       file1

Note that I want to keep the -C option to detect renames and copies inside the same directory.