git-annex 3.20120522 released with [[!toggle text="these changes"]]
[[!toggleable text="""
   * Pass -a to cp even when it supports --reflink=auto, to preserve
     permissions.
   * Clean up handling of git directory and git worktree.
   * Add support for core.worktree, and fix support for GIT\_WORK\_TREE and
     GIT\_DIR."""]]