I’ve accidentally added a picture of my bum to this repo

$ git show 84c344
commit 84c344c1874736a6d063ed45abe21e20815525b9
Author: Matthew Rudy Jacobs <MatthewRudyJacobs@gmail.com>
Date:   Wed Sep 15 18:25:35 2010 +0800

  add my bum

diff --git a/mybum.jpg b/mybum.jpg
new file mode 100644
index 0000000..018be38
--- /dev/null
+++ b/mybum.jpg
@@ -0,0 +1 @@
+a picture of my bum

so let’s try and wipe it from history.

$ git filter-branch --tree-filter 'rm -f mybum.jpg' HEAD
Rewrite 76a50a3b1b3263d84517c8e6241ec0bf2bf36fdc (4/4)
Ref 'refs/heads/master' was rewritten

now commit 84c344 is still there, but it is not in our branch. in master we’ve rewritten this commit to

$ git show f59366
commit f59366420a8b753de5a0d2812e0abbfb95fccfdf
Author: Matthew Rudy Jacobs <MatthewRudyJacobs@gmail.com>
Date:   Wed Sep 15 18:25:35 2010 +0800

  add my bum

of course my bum is no longer there.