gittest.sh

#!/bin/bash

set -e

(
	mkdir test
	pushd test
	git init
	echo 'Hello, World!' > testfile
	git add testfile



	GIT_AUTHOR_DATE='2012-12-21 18:15:43' \
	GIT_COMMITTER_DATE='2012-12-22 11:23:18' \
	TZ='Europe/Warsaw' \
	git \
		-c user.name=TheWild \
		-c user.email=thewild@example.org \
		commit -m 'Initial commit.' --author 'TheWild <thewild@example.org>'



) > /dev/null

git -C test rev-parse HEAD    # aa29c5c76be95bd75f8bfb60f0fcbcdae092ce03

rm -rf test