# git rev-parse -q --verify af408bc6c96e3ccb1f73012936b04332e7dc59f9^{commit}
af408bc6c96e3ccb1f73012936b04332e7dc59f9
already have revision, skipping fetch
# git checkout -q -f -B kisskb af408bc6c96e3ccb1f73012936b04332e7dc59f9
# git clean -qxdf
# < git log -1
# commit af408bc6c96e3ccb1f73012936b04332e7dc59f9
# Author: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
# Date:   Wed Jan 1 22:41:06 2020 +0100
# 
#     Linux 5.4.8-rc1
# < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version
# < git log --format=%s --max-count=1 af408bc6c96e3ccb1f73012936b04332e7dc59f9
# < make -s -j 24 ARCH=powerpc O=/kisskb/build/stable-rc-5.4_powernv_defconfig_ppc64le-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  powernv_defconfig
# make -s -j 24 ARCH=powerpc O=/kisskb/build/stable-rc-5.4_powernv_defconfig_ppc64le-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
WARNING: vmlinux.o(.text+0x2fc8): Section mismatch in reference from the variable start_here_common to the function .init.text:start_kernel()
The function start_here_common() references
the function __init start_kernel().
This is often because start_here_common lacks a __init 
annotation or the annotation of start_kernel is wrong.

Completed OK
# rm -rf /kisskb/build/stable-rc-5.4_powernv_defconfig_ppc64le-gcc5
# Build took: 0:03:32.045084