how about that?

mock.rb

iter my_array do |it|
  execute "git fetch -p" do
    cwd path_for(it)
  end
end

# ---> with my_array = %(foo bar), this should lead to

execute "foo: git fetch -p" do
  command "git fetch -p"
  cwd path_for(foo)
end

execute "bar: git fetch -p" do
  command "git fetch -p"
  cwd path_for(bar)
end