diff --git a/README.md b/README.md
index ab2637e8..57a37a67 100644
--- a/README.md
+++ b/README.md
@@ -562,6 +562,8 @@ the case.
 
 * `.git/branch`: Name of the original branch that was cloned.
 
+* `.git/branches_list.json`: List of all branches (requires `all_branches` set to `true`).
+
 * `.git/tags`: Comma-separated list of tags associated with this commit.
 
 * `.git/author`: Commit author name.
diff --git a/assets/in b/assets/in
index 7c50dda4..3f074f27 100755
--- a/assets/in
+++ b/assets/in
@@ -311,6 +311,11 @@ git log -1 --format=%cd --date=${timestamp_format} > .git/commit_timestamp
 # a custom tag, or package to publish
 echo "$(git describe ${describe_ref_options})" > .git/describe_ref
 
+if [ "${all_branches,,}" == "true" ]; then
+  git for-each-ref --format '%(refname:lstrip=3)' --exclude 'refs/remotes/*/HEAD' refs/remotes \
+  | jq --raw-input --slurp --compact-output 'split("\n")[:-1]' > .git/branches_list.json
+fi
+
 
 if [ "$clean_tags" == "true" ]; then
   git tag | xargs git tag -d