# git rev-parse -q --verify 5b29268443c010e77bd281f8439188f03c4cdf7c^{commit}
# git fetch -q -n -f git://gitlab.ozlabs.ibm.com/mirror/linux-stable-rc.git linux-5.4.y
warning: The last gc run reported the following. Please correct the root cause
and remove .git/gc.log.
Automatic cleanup will not be performed until the file is removed.

warning: There are too many unreachable loose objects; run 'git prune' to remove them.

# git rev-parse -q --verify 5b29268443c010e77bd281f8439188f03c4cdf7c^{commit}
5b29268443c010e77bd281f8439188f03c4cdf7c
# git checkout -q -f -B kisskb 5b29268443c010e77bd281f8439188f03c4cdf7c
# git clean -qxdf
# < git log -1
# commit 5b29268443c010e77bd281f8439188f03c4cdf7c
# Author: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
# Date:   Fri Jan 24 18:40:16 2020 +0100
# 
#     Linux 5.4.15-rc2
# < /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 5b29268443c010e77bd281f8439188f03c4cdf7c
# < make -s -j 48 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 48 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: 0:09:16.056696