Most git commands are run in a command line Window, and the output is printed as text.
However, an X server is required to show the output of programs with a graphical user interface that are run on Linux/Unix systems.
When running a native Linux/Unix program in an SSH session originating from a Windows machine, an X server has to be installed and run on the Windows machine to be able to display the graphic output.
— Martin Burnicki martin.burnicki@burnicki.net 2020-03-18