fix: show console when git hooks fail

[skrobul]

Closes #1652

[giodamelio]

Can confirm this works great for me.

[giodamelio]

Wait, I spoke to soon. It worked the first time, but now it is giving this error. Not sure why. Hopefully it can be helpful!

Lua callback: .../myNeovimPackages/start/neogit/lua/neogit/lib/buffer.lua:438: E474: Invalid argument
stack traceback:
        [C]: in function 'nvim_set_option_value'
        .../myNeovimPackages/start/neogit/lua/neogit/lib/buffer.lua:438: in function 'set_buffer_option'
        .../myNeovimPackages/start/neogit/lua/neogit/lib/buffer.lua:722: in function 'create'
        ...ackages/start/neogit/lua/neogit/buffers/process/init.lua:103: in function 'open'
        ...ackages/start/neogit/lua/neogit/buffers/process/init.lua:48: in function 'show'
        ...ack/myNeovimPackages/start/neogit/lua/neogit/process.lua:352: in function <...ack/myNeovimPackages/start/neogit/lua/neogit/process.lua:326>