git reset --hard HEAD^
'
+test_expect_success 'removed files and relative paths' '
+ test_when_finished "rm -rf foo" &&
+ git init foo &&
+ >foo/foo.txt &&
+ git -C foo add foo.txt &&
+ git -C foo commit -m first &&
+ git -C foo rm foo.txt &&
+
+ mkdir -p foo/bar &&
+ git -C foo/bar commit -m second ../foo.txt
+'
+
test_expect_success 'using invalid commit with -C' '
test_must_fail git commit --allow-empty -C bogus
'