Comment 2 for bug 1553907

It is not in the man but it is in fsck's help:

 $ fsck --help
fsck from util-linux 2.27.1
fsck.ext4: invalid option -- 'h'
Usage: fsck.ext4 [-panyrcdfvtDFV] [-b superblock] [-B blocksize]
                [-I inode_buffer_blocks] [-P process_inode_size]
                [-l|-L bad_blocks_file] [-C fd] [-j external_journal]
                [-E extended-options] device

Emergency help:
 -p Automatic repair (no questions)