Thank you for your response.
OK. I will explain why I want to do that.
For example, let's say I have a workspace that looks like the image below.
Then, when I want to change only "SubFolder1", I will select "SubFolder1".
In this case, "Folder1" is selected, but "Folder1.meta" is not selected. If I open the Unity project at this state, another "Floder1.meta" will created by Unity automatically. It conflicts with a existing "Folder1.meta" file when it is being checked in.
Because of this behavior, I have to manually delete the meta files to clean my workspace. If I can select/unselect only meta files, I will be able to avoid this problem.
That's why I'm asking to select only meta files.