Capistrano deploy:update fails, but setup and check work - ruby-on-rails

Question

I'm a newbie, so apologies if this is a silly question, but can anyone help me decipher this deploy error? I've finally managed to get 'cap deploy:setup' and 'cap deploy:check' to run without errors. Now, I'm stuck at 'cap deploy:update'. Judging from the error output, it looks like there's a problem with my deploy file, but I have no idea what the problem might be. The shell output and deploy file are below. Any help would be very much appreciated!
Some background: I'm deploying to a friend's server which is running passenger. We're using ruby 1.9.2-p290, rails 3.1.3, capistrano 2.11.2, and MacOS 10.6.
Here's a sample of the deploy error output:
my-MacBook-Pro:projectfolder myuser$ cap deploy:update
* executing `deploy:update'
** transaction: start
* executing `deploy:update_code'
updating the cached checkout on all servers
executing locally: "git ls-remote ssh://git#server.example.ca/usr/local/git_root/arbiterapi.git master"
*** [deploy:update_code] rolling back
* executing "rm -rf /usr/local/www/sites/project.example.ca/releases/20120330191423; true"
servers: ["project.example.ca"]
[project.example.ca] executing command
[project.example.ca] rvm_path=/usr/local/rvm /usr/local/rvm/bin/rvm-shell 'ruby-1.9.2-p290#project' -c 'rm -rf /usr/local/www/sites/project.example.ca/releases/20120330191423; true'
command finished in 663ms
/Users/myuser/.rvm/gems/ruby-1.9.2-p290#project/gems/capistrano-2.11.2/lib/capistrano/recipes/deploy.rb:107:in ``': No such file or directory - git ls-remote ssh://git#server.example.ca/usr/local/git_root/project.git master (Errno::ENOENT)
from /Users/myuser/.rvm/gems/ruby-1.9.2-p290#project/gems/capistrano-2.11.2/lib/capistrano/recipes/deploy.rb:107:in `block in run_locally'
from /Users/myuser/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/benchmark.rb:310:in `realtime'
from /Users/myuser/.rvm/gems/ruby-1.9.2-p290#project/gems/capistrano-2.11.2/lib/capistrano/recipes/deploy.rb:106:in `run_locally'
from /Users/myuser/.rvm/gems/ruby-1.9.2-p290#project/gems/capistrano-2.11.2/lib/capistrano/recipes/deploy.rb:44:in `block (3 levels) in load'
from /Users/myuser/.rvm/gems/ruby-1.9.2-p290#project/gems/capistrano-2.11.2/lib/capistrano/recipes/deploy.rb:96:in `with_env'
from /Users/myuser/.rvm/gems/ruby-1.9.2-p290#project/gems/capistrano-2.11.2/lib/capistrano/recipes/deploy.rb:44:in `block (2 levels) in load'
from /Users/myuser/.rvm/gems/ruby-1.9.2-p290#project/gems/capistrano-2.11.2/lib/capistrano/recipes/deploy/scm/git.rb:227:in `query_revision'
... etc.
The rest of the error output points to the capistrano folder as well. The output seems too long to include in its entirety. But I can provide the rest if it might help!
Here's the deploy file:
$:.unshift(File.expand_path('./lib', ENV['rvm_path'])) # Add RVM's lib directory to the load path.
require "rvm/capistrano" # Load RVM's capistrano plugin.
set :application, "Project"
set :scm, "git"
set :repository, "ssh://git#server.example.ca/usr/local/git_root/project.git"
set :user, "deploy"
#set :rvm_bin_path, "/usr/local/rvm/bin"
set :rvm_ruby_string, "ruby-1.9.2-p290#project"
set :normalize_asset_timestamps, false
ssh_options[:forward_agent] = false
set :branch, "master"
set :deploy_via, :remote_cache
set :deploy_to, "/usr/local/www/sites/project.example.ca/"
set :use_sudo, false
set :domain, 'project.example.ca'
role :app, domain
role :web, domain
role :db, domain, :primary => true

Answer 1

The error is the line
No such file or directory - git ls-remote ssh://git#server.example.ca/usr/local/git_root/project.git master (Errno::ENOENT)
So it is failing at checkout out the repository. Why do you have the ssh prefix? When specifying a user (git#), you shouldn't have a protocol as well - the repository should just be set to
git#server.example.ca/usr/local/git_root/project.git
or whatever the actual URL is for git repository for the project.
FYI - neither deploy:setup nor deploy:check actually checkout the code, which is why those two work.