preferred way to pass function template argument [duplicate]

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• Should templated functions take lambda arguments by value or by rvalue reference? 3 answers

I recently saw a code like this

template<class F> void foo(const F& f){...}

which jumped to my sight immidiately, since I am rather used to

template<class F> void foo(F f){...}

Now that I am thinking of it I do not see the good reason to prefer one to another (at least in serial code). Moreover there is another way to do that

template<class F> void foo(F&& f){...}

which is probably better then the other two, but still I am not sure. So what is the right way to pass the callables as a template parameter nowadays?