I want to clone a GitHub repository from Visual Studio and the default path is C:\\Users\\[User]\\Sources\\Repos\\[NameOfProject].
C:\\Users\\[User]\\Sources\\Repos\\[NameOfProject]
For VS2013 v4+ and VS2015
Click on "Settings" (from either the project Home menu or from the top dropdown menu), then select "Git Settings." You will see a Global Setting of "Default Repository Location" (the one you want). Change it and click Update.