加入分支参数

app/models/repository/git.rb

@@ -38,8 +38,8 @@ class Repository::Git < Repository
     'Git'
   end
 
-  def commits(authors, start_date, end_date)
+  def commits(authors, start_date, end_date, branch='master')
-    scm.commits(authors, start_date, end_date).map {|commit|
+    scm.commits(authors, start_date, end_date,branch).map {|commit|
       [commit[:author], commit[:num]]
     }
   end

lib/redmine/scm/adapters/git_adapter.rb

@@ -396,10 +396,10 @@ module Redmine
           sum[:insertion] + sum[:deletion]
         end
 
-        def commits(authors, start_date, end_date)
+        def commits(authors, start_date, end_date, branch='master')
           rs = []
           authors.each do |author|
-            cmd_args = %W|log --pretty=tformat: --shortstat --author=#{author} --since=#{start_date} --until=#{end_date}|
+            cmd_args = %W|log #{branch} --pretty=tformat: --shortstat --author=#{author} --since=#{start_date} --until=#{end_date}|
             commits = ''
             git_cmd(cmd_args) do |io|
               commits = io.read