I expect to be able to use the terminal command line syntax vim +GoInstallBinaries +qall to install the vim-go binaries without further input from the user. This greatly helps scripting the install of vim-go.
Unfortunately once the terminal screen is filled up with log messages I am required to press the space bar to continue with the binary install process.
Set Go path:
$ export GOPATH=/home/grace
Install pathogen and vim-go for user grace:
$ mkdir -p /home/grace/.vim/autoload /home/grace/.vim/bundle \
&& curl -LSso /home/grace/.vim/autoload/pathogen.vim \
https://tpo.pe/pathogen.vim \
&& touch /home/grace/.vimrc \
&& echo "execute pathogen#infect()" >> /home/grace/.vimrc \
&& echo "syntax on" >> /home/grace/.vimrc \
&& echo "filetype plugin indent on" >> /home/grace/.vimrc \
&& git clone --depth=1 https://github.com/fatih/vim-go.git \
/home/grace/.vim/bundle/vim-go
Now install the binaries via the terminal command line:
$ vim +GoInstallBinaries +qall
The binaries start installing but get to the following point where the space bar must be pressed for the rest of the binaries to install:

Ubuntu 16.04
$ cat .vimrc
execute pathogen#infect()
syntax on
filetype plugin indent on
$ vim --version
VIM - Vi IMproved 7.4 (2013 Aug 10, compiled Nov 24 2016 16:44:48)
Included patches: 1-1689
Extra patches: 8.0.0056
md5-a5d8bc7af32089882dccfb4be21c907f
$ go version
go version go1.9 linux/amd64
vim-go version: Unsure how to determine this but it's been downloaded within the last week.
Note that I created this issue with the hope that it can be fixed with documentation.
Unfortunately once the terminal screen is filled up with log messages I am required to press the space bar to continue with the binary install process.
This is because the messages don't fit on your window; see :help hit-enter and :help 'shortmess'.
The easiest way to fix it is to use :silent so that the messages aren't displayed at all:
vim +'silent :GoInstallBinaries' +qall
BTW, using something like vim -esN +GoInstallBinaries +q is perhaps better, since in Ex mode it won't clobber your terminal (coincidentally I was working on something else today that uses this).
@Carpetsmoker thanks for your help.
Most helpful comment
This is because the messages don't fit on your window; see
:help hit-enterand:help 'shortmess'.The easiest way to fix it is to use
:silentso that the messages aren't displayed at all: