# git rev-parse -q --verify e71ba9452f0b5b2e8dc8aa5445198cd9214a6a62^{commit}
e71ba9452f0b5b2e8dc8aa5445198cd9214a6a62
already have revision, skipping fetch
# git checkout -q -f -B kisskb e71ba9452f0b5b2e8dc8aa5445198cd9214a6a62
# git clean -qxdf
# < git log -1
# commit e71ba9452f0b5b2e8dc8aa5445198cd9214a6a62
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Sun Jan 3 15:55:30 2021 -0800
# 
#     Linux 5.11-rc2
# < /opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux-gcc --version
# < /opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux-ld --version
# < git log --format=%s --max-count=1 e71ba9452f0b5b2e8dc8aa5445198cd9214a6a62
# < make -s -j 8 ARCH=um O=/kisskb/build/linus_um-defconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 defconfig
# < make -s -j 8 ARCH=um O=/kisskb/build/linus_um-defconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 help
# make -s -j 8 ARCH=um O=/kisskb/build/linus_um-defconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 olddefconfig
# make -s -j 8 ARCH=um O=/kisskb/build/linus_um-defconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 
  LINK linux
Completed OK
# rm -rf /kisskb/build/linus_um-defconfig_um-x86_64
# Build took: 0:01:09.834161