1.0.2beta1: follow-ups to [12479], refactored and simplified `git_fs.py` (refs #11164)
1.0.2beta1: follow-ups to [12479], refactored and simplified `git_fs.py` (refs #11164)


git-svn-id: 3aa280b99a9b480b02b1e2eda394e64594ad3297@13113 af82e41b-90c4-0310-8c96-b1721e28e2e2

jun66j5/trac-ja,jun66j5/trac-ja,jun66j5/trac-ja,jun66j5/trac-ja