Git support in Capistrano 2.5 got a little lovin’, but as a result, it may have broke your deploys. By default, Capistrano now uses the -q flag to tell git to not be so chatty. But older versions of git (1.4.x and maybe some early 1.5.x versions) don’t support the -q flag. If upgrading git isn’t an option, the solution is simple. Just tell Capistrano to take the muzzle off of git:

set :scm_verbose, true