From: Prarit Bhargava on
gitlab.com
https://gitlab.com/cki-project/kernel-ark/-/merge_requests/1579#note_8272...
@dzickus, @jmflinuxtx.
The update wasn't as trivial as we thought. The include files are
evaluated prior to a makefile target parameter so setting, for example,
```
dist-git: export PREBUILD_GIT_ONLY=0
```
will not work.
Instead I've chosen to explicitly set PREBUILD_GIT_ONLY to 0 for the
dist-git and dist-git-test targets.