场景：git checkout -f的使用场景
wangxiaodeMacBook-Pro:playgit wangxiao$ git checkout -f --help
usage: git checkout [<options>] <branch>
or: git checkout [] [] -- ...
-q, --quiet suppress progress reporting
-b create and checkout a new branch
-B create/reset and checkout a branch
-l create reflog for new branch
--detach detach HEAD at named commit
-t, --track set upstream info for new branch
--orphan
new unparented branch
-2, --ours checkout our version for unmerged files
-3, --theirs checkout their version for unmerged files
-f, --force force checkout (throw away local modifications)
-m, --merge perform a 3-way merge with the new branch
--overwrite-ignore update ignored files (default)
--conflict conflict style (merge or diff3)
-p, --patch select hunks interactively
--ignore-skip-worktree-bits
do not limit pathspecs to sparse entries only
--ignore-other-worktrees
do not check if another worktree is holding the given ref
--recurse-submodules[=]
control recursive updating of submodules
--progress force progress reporting
