# git rev-parse -q --verify 4107be0fa04a568e3b3651726a4d7c4c82616ac7^{commit}
# git fetch -q -n -f git://gitlab.ozlabs.ibm.com/mirror/linux-stable-rc.git linux-4.19.y
error: 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 4107be0fa04a568e3b3651726a4d7c4c82616ac7^{commit}
4107be0fa04a568e3b3651726a4d7c4c82616ac7
# git checkout -q -f -B kisskb 4107be0fa04a568e3b3651726a4d7c4c82616ac7
# git clean -qxdf
# < git log -1
# commit 4107be0fa04a568e3b3651726a4d7c4c82616ac7
# Author: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
# Date:   Wed Mar 20 21:27:37 2019 +0100
# 
#     Linux 4.19.31-rc1
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-gcc --version
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-ld --version
# < git log --format=%s --max-count=1 4107be0fa04a568e3b3651726a4d7c4c82616ac7
# < make -s -j 10 ARCH=powerpc O=/kisskb/build/stable-rc-4.19_powerpc-allnoconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  allnoconfig
# make -s -j 10 ARCH=powerpc O=/kisskb/build/stable-rc-4.19_powerpc-allnoconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  
/kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl':
/kisskb/src/kernel/printk/printk.c:185:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized]
Completed OK
# rm -rf /kisskb/build/stable-rc-4.19_powerpc-allnoconfig_powerpc-gcc4.6
# Build took: 0:02:05.778727