Git: 怎样获得完整hash？

我从某些地方得到一些短hash, 比如，git diff:

diff --git a/Note1.md b/Note1.md
index 2b95b9f..b9596f0 100644
--- a/Note1.md
+++ b/Note1.md
@@ -1328,6 +1328,12 @@ variables.(starting with (@)

怎样从这些短hash (2b95b9f, b9596f0)中获得完整的40位hash呢？

git log | grep "b95b9f" 试试