t9101: use "git hash-object" without dash
t9101: use "git hash-object" without dash

Signed-off-by: Nanako Shiraishi <7d97fbf70141dda63063292abadb698cc511a125@lavabit.com>
Signed-off-by: Junio C Hamano <a6723cc3f76163bf7adb636a73ac3b0ceb3e6b9b@pobox.com>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git