# git rev-parse -q --verify 90e2ba75f3b479bb8fb03958c1882389aeb50c45^{commit}
# git fetch -q -n -f git://gitlab.ozlabs.ibm.com/mirror/linux-stable-rc.git linux-4.9.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 90e2ba75f3b479bb8fb03958c1882389aeb50c45^{commit}
90e2ba75f3b479bb8fb03958c1882389aeb50c45
# git checkout -q -f -B kisskb 90e2ba75f3b479bb8fb03958c1882389aeb50c45
# git clean -qxdf
# < git log -1
# commit 90e2ba75f3b479bb8fb03958c1882389aeb50c45
# Author: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
# Date:   Fri Dec 28 12:31:17 2018 +0100
# 
#     Linux 4.9.148-rc1
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/arm-unknown-linux-gnueabi/bin/arm-unknown-linux-gnueabi-gcc --version
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/arm-unknown-linux-gnueabi/bin/arm-unknown-linux-gnueabi-ld --version
# < git log --format=%s --max-count=1 90e2ba75f3b479bb8fb03958c1882389aeb50c45
# < make -s -j 48 ARCH=arm O=/kisskb/build/stable-rc-4.9_versatile_defconfig_arm CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/arm-unknown-linux-gnueabi/bin/arm-unknown-linux-gnueabi-  versatile_defconfig
# make -s -j 48 ARCH=arm O=/kisskb/build/stable-rc-4.9_versatile_defconfig_arm CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/arm-unknown-linux-gnueabi/bin/arm-unknown-linux-gnueabi-  
/kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl':
/kisskb/src/kernel/printk/printk.c:183:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized]
Completed OK
# rm -rf /kisskb/build/stable-rc-4.9_versatile_defconfig_arm
# Build took: 0:01:08.608698