# git rev-parse -q --verify 3400efb6b47c77a5c59297a650b0570874087bbf^{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 3400efb6b47c77a5c59297a650b0570874087bbf^{commit}
3400efb6b47c77a5c59297a650b0570874087bbf
# git checkout -q -f -B kisskb 3400efb6b47c77a5c59297a650b0570874087bbf
# git clean -qxdf
# < git log -1
# commit 3400efb6b47c77a5c59297a650b0570874087bbf
# Author: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
# Date:   Tue Dec 17 21:07:19 2019 +0100
# 
#     Linux 5.4.5-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 3400efb6b47c77a5c59297a650b0570874087bbf
# < make -s -j 8 ARCH=powerpc O=/kisskb/build/stable-rc-5.4_ppc64le_defconfig_ppc64le-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  ppc64le_defconfig
# make -s -j 8 ARCH=powerpc O=/kisskb/build/stable-rc-5.4_ppc64le_defconfig_ppc64le-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
WARNING: vmlinux.o(.text+0x31e4): Section mismatch in reference from the variable __boot_from_prom to the function .init.text:prom_init()
The function __boot_from_prom() references
the function __init prom_init().
This is often because __boot_from_prom lacks a __init 
annotation or the annotation of prom_init is wrong.

WARNING: vmlinux.o(.text+0x33c8): 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_ppc64le_defconfig_ppc64le-gcc5
# Build took: 0:07:02.664739