[boost] [git] The any library does not pull cleanly because of a forced update on develop and master.

I tried to update my local repositories to the latest changes in each
submodule:

     git pull; git submodule foreach --recursive git pull

When it got to the libs/any submodule, I got the following message:

remote: Counting objects: 27, done.
remote: Compressing objects: 100% (2/2), done.
remote: Total 6 (delta 2), reused 6 (delta 2)
Unpacking objects: 100% (6/6), done.
>From https://github.com/boostorg/any
 + 3f0b981...e3e5da6 develop    -> origin/develop  (forced update)
 + 38039b3...d35b2d6 master     -> origin/master  (forced update)
 * [new tag]         20131209-develop -> 20131209-develop
 * [new tag]         20131209-master -> 20131209-master

and my editor popped up with a merge commit message to edit.  I think
that's because the develop and master branches were force updated,
re-writing history in develop and master.

Michael