Set local colorcolumn for gitcommit buffers

[vsushkov]

Wouldn't it be great if the plugin will do something like setlocal colorcolumn=50,72 for git commit buffers?

[tpope]

I think this is a good idea, but it's a little too invasive for files that ship with Vim. (If you look for other included runtime files that change 'colorcolumn', you won't find any.)