Kconfig check/edit requires git repository
In https://wiki.postmarketos.org/wiki/Porting_to_a_new_device#Remove_failed_patches we have to make kconfig happy, however if there is no git repository available and there is only a tar file, there is no way to specify the extracted files for kconfig, even though in https://wiki.postmarketos.org/wiki/Porting_to_a_new_device#Source_code we were able to do pmbootstrap build linux-wiki-example --src=/path/to/extracted/kernel/source