GitDownloadStrategy: quiet reset in non-verbose mode

Library/Homebrew/download_strategy.rb

@@ -342,7 +342,7 @@ class GitDownloadStrategy < AbstractDownloadStrategy
         # otherwise the checkout-index won't checkout HEAD
         # https://github.com/mxcl/homebrew/issues/7124
         # must specify origin/HEAD, otherwise it resets to the current local HEAD
-        quiet_safe_system @@git, "reset", "--hard", "origin/HEAD"
+        quiet_safe_system @@git, "reset", { :quiet_flag => "-q" }, "--hard", "origin/HEAD"
       end
       # http://stackoverflow.com/questions/160608/how-to-do-a-git-export-like-svn-export
       safe_system @@git, 'checkout-index', '-a', '-f', "--prefix=#{dst}/"