[root@neo ~]# tar -cf - . | tar -tvf - | md5sum
83298d9b891d7f05cf016bc96451a06f  -
[root@neo ~]# tar -cf - . | bsdtar -c --strip-components 1 -f - @- | tar -tvf - | md5sum
83298d9b891d7f05cf016bc96451a06f  -