Some people have post-checkout hooks that take a lot of time, which makes
discarding changes slow. You can argue that a post-checkout hook should only run
when you switch branches, so it doesnt't have to run when checking out single
files or directories. You can also argue that lazygit might have implemented
discarding changes by taking the current patch and applying it in reverse, which
wouldn't have run a post-checkout hook either.
So disable them for all cases where we use git checkout with a path; this
includes checking out a file from the commit files view.
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