diff --git a/contrib/git/README.md b/contrib/git/README.md
index 8515f3512..68e04d9a0 100644
--- a/contrib/git/README.md
+++ b/contrib/git/README.md
@@ -235,6 +235,7 @@ you can answer `y` with no issue.
 <kbd>N</kbd>        | show previous commit
 <kbd>p</kbd>        | show previous commit
 <kbd>q</kbd>        | leave micro-state and git timemachine
+<kbd>Y</kbd>        | copy current commit hash
 
 ### Git gutter
 
diff --git a/contrib/git/packages.el b/contrib/git/packages.el
index a3418c2a9..6da388059 100644
--- a/contrib/git/packages.el
+++ b/contrib/git/packages.el
@@ -169,7 +169,7 @@ which require an initialization must be listed explicitly in the list.")
         ("p" git-timemachine-show-previous-revision)
         ("n" git-timemachine-show-next-revision)
         ("N" git-timemachine-show-previous-revision)
-        ("y" git-timemachine-kill-revision)
+        ("Y" git-timemachine-kill-revision)
         ("q" nil :exit t)))))
 
 ;; this mode is not up to date