diff --git a/lib/redmine/scm/adapters/git_adapter.rb b/lib/redmine/scm/adapters/git_adapter.rb
index 81c361f6e..6c56a7e24 100644
--- a/lib/redmine/scm/adapters/git_adapter.rb
+++ b/lib/redmine/scm/adapters/git_adapter.rb
@@ -404,6 +404,7 @@ module Redmine
             git_cmd(cmd_args) do |io|
               commits = io.read
             end
+            logger.info "git log output for #{author} #{commits}"
             rs << {author: author, num: parse_commit(commits)}
           end
           rs