diff --git a/.git-blame-ignore-revs b/.git-blame-ignore-revs
new file mode 100644
index 0000000000..c43388fcee
--- /dev/null
+++ b/.git-blame-ignore-revs
@@ -0,0 +1 @@
+9d1fd093071278be77428dba189d958d5b7a7aeb
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index b4dbaced61..4537c3b583 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -66,3 +66,11 @@ See the [RELEASING.md](RELEASING.md) for instructions.
 Please note that libraries need bounds on the version of their dependencies to avoid bitrot and be effectively reusable.
 
 [CHaP]: https://github.com/input-output-hk/cardano-haskell-packages
+
+## Improving `git blame`
+
+You can have `git blame` ignore the reformatting done when [introducting fourmolu](https://github.com/IntersectMBO/cardano-cli/pull/835/commits/9d1fd093071278be77428dba189d958d5b7a7aeb) by specifying `blame.ignoreRevsFile` to `.git-blame-ignore-revs` in your repository's git configuration. Do it as follows:
+
+```shell
+git config --local blame.ignoreRevsFile .git-blame-ignore-revs
+```