Some lines to start with...

[mikkeschiren]

To get version number in the modules....

[wimleers]

Thanks for starting this! But, I think it's not really the right approach. For starters, you'll run into problems when updating a module from one version to the next, because you'd have to clean up the module's .info file.
I think it's better to just fix the performance problem in the git_deploy module: https://drupal.org/node/1511112.