[[def_gitfile]]gitfile::
A plain file `.git` at the root of a working tree that
points at the directory that is the real repository.
+ For proper use see linkgit:git-worktree[1] or linkgit:git-submodule[1].
+ For syntax see linkgit:gitrepository-layout[5].
[[def_grafts]]grafts::
Grafts enable two otherwise different lines of development to be joined