Index: git_adapter.rb
===================================================================
--- git_adapter.rb	(revision 17867)
+++ git_adapter.rb	(working copy)
@@ -82,9 +82,11 @@
           git_cmd(cmd_args) do |io|
             io.each_line do |line|
               branch_rev = line.match('\s*(\*?)\s*(.*?)\s*([0-9a-f]{40}).*$')
-              bran = GitBranch.new(branch_rev[2])
-              bran.revision =  branch_rev[3]
-              bran.scmid    =  branch_rev[3]
+              bran_name = Redmine::CodesetUtil.replace_invalid_utf8(branch_rev[2])
+              bran_revision = Redmine::CodesetUtil.replace_invalid_utf8(branch_rev[3])
+              bran = GitBranch.new(bran_name)
+              bran.revision =  bran_revision
+              bran.scmid    =  bran_revision
               bran.is_default = ( branch_rev[1] == '*' )
               @branches << bran
             end
@@ -99,7 +101,7 @@
           @tags = []
           cmd_args = %w|tag|
           git_cmd(cmd_args) do |io|
-            @tags = io.readlines.sort!.map{|t| t.strip}
+            @tags = io.readlines.sort!.map{|t| Redmine::CodesetUtil.replace_invalid_utf8(t.strip) }
           end
           @tags
         rescue ScmCommandAborted