BUG simple "revert" fails

Attached is a tarball with a couple of repositories.  eg-sub is a 
submodule in eg.  In eg there's a commit, 
cd626e6baaa0888c6090e1f040f9f0ba8bfef218, which inappropriately changed 
a file in eg-sub.  It's a newby mistake with git and submodules.

The problem is that the problem can't be reverted.  It fails with 
unknown object It is a submodule.

To reproduce, unpack the tarball, cd to eg and:
git revert cd626e6baaa0888c6090e1f040f9f0ba8bfef218

Thanks for your time.