управляйте несколькими рабочими деревьями (Manage multiple working trees)
REFS
In multiple working trees, some refs may be shared between all
working trees and some refs are local. One example is HEAD which
is different for each working tree. This section is about the
sharing rules and how to access refs of one working tree from
another.
In general, all pseudo refs are per working tree and all refs
starting with refs/ are shared. Pseudo refs are ones like HEAD
which are directly under $GIT_DIR instead of inside
$GIT_DIR/refs. There are exceptions, however: refs inside
refs/bisect and refs/worktree are not shared.
Refs that are per working tree can still be accessed from another
working tree via two special paths, main-worktree and worktrees.
The former gives access to per-working tree refs of the main
working tree, while the latter to all linked working trees.
For example, main-worktree/HEAD or main-worktree/refs/bisect/good
resolve to the same value as the main working tree's HEAD and
refs/bisect/good respectively. Similarly, worktrees/foo/HEAD or
worktrees/bar/refs/bisect/bad are the same as
$GIT_COMMON_DIR/worktrees/foo/HEAD and
$GIT_COMMON_DIR/worktrees/bar/refs/bisect/bad.
To access refs, it's best not to look inside $GIT_DIR directly.
Instead use commands such as git-rev-parse(1) or
git-update-ref(1) which will handle refs correctly.
