The goal to show hash changes is to add support for json output printing full
hashes to increase support for automation and Nuclide. To achieve the goal in
best and clean way, we must use formatter. So support of using formatter and
having json output for commands will be added to commands. Since for those
commands we don't need this wrapper, lets add a functionality to skip the
wrapper for some commands.
We need to update the set introduced in this patch for each command we add
support to show hash changes.