upgrades the way to extract refs with rugged
upgrades the way to extract refs with rugged

Apparently it no longer accepts regexps, only glogs as strings.

fxn/rails-contributors,maclover7/rails-contributors,fxn/rails-contributors,maclover7/rails-contributors,maclover7/rails-contributors,amitsuroliya/rails-contributors,amitsuroliya/rails-contributors,amitsuroliya/rails-contributors,maclover7/rails-contributors,fxn/rails-contributors,amitsuroliya/rails-contributors,fxn/rails-contributors