# git rev-parse -q --verify 1722257b8ececec9b3b83a8b14058f8209d78071^{commit}
# git fetch -q -n -f git://fs.ozlabs.ibm.com/kernel/stable linux-4.19.y
remote: error: refs/tags/v5.10.42 does not point to a valid object!        
remote: error: refs/tags/v5.12.9 does not point to a valid object!        
remote: error: refs/tags/v5.4.124 does not point to a valid object!        
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 1722257b8ececec9b3b83a8b14058f8209d78071^{commit}
1722257b8ececec9b3b83a8b14058f8209d78071
# git checkout -q -f -B kisskb 1722257b8ececec9b3b83a8b14058f8209d78071
# git clean -qxdf
# < git log -1
# commit 1722257b8ececec9b3b83a8b14058f8209d78071
# Author: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
# Date:   Thu Jun 3 08:38:13 2021 +0200
# 
#     Linux 4.19.193
#     
#     Link: https://lore.kernel.org/r/20210531130640.131924542@linuxfoundation.org
#     Tested-by: Jason Self <jason@bluehome.net>
#     Tested-by: Hulk Robot <hulkrobot@huawei.com>
#     Tested-by: Pavel Machek (CIP) <pavel@denx.de>
#     Tested-by: Guenter Roeck <linux@roeck-us.net>
#     Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
# < /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 1722257b8ececec9b3b83a8b14058f8209d78071
# < make -s -j 8 ARCH=powerpc O=/kisskb/build/stable-4.19_ppc64le_defconfig_powerpc-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-4.19_ppc64le_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  help
# make -s -j 8 ARCH=powerpc O=/kisskb/build/stable-4.19_ppc64le_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  olddefconfig
# make -s -j 8 ARCH=powerpc O=/kisskb/build/stable-4.19_ppc64le_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
WARNING: modpost: Found 2 section mismatch(es).
To see full details build your kernel with:
'make CONFIG_DEBUG_SECTION_MISMATCH=y'
Completed OK
# rm -rf /kisskb/build/stable-4.19_ppc64le_defconfig_powerpc-gcc5
# Build took: 0:06:33.301179