смена ветвей или восстановление файлов рабочего дерева (Switch branches or restore working tree files)
ARGUMENT DISAMBIGUATION
When there is only one argument given and it is not -- (e.g. git
checkout abc), and when the argument is both a valid <tree-ish>
(e.g. a branch abc exists) and a valid <pathspec> (e.g. a file or
a directory whose name is "abc" exists), Git would usually ask
you to disambiguate. Because checking out a branch is so common
an operation, however, git checkout abc takes "abc" as a
<tree-ish> in such a situation. Use git checkout -- <pathspec> if
you want to checkout these paths out of the index.
