From e54971d019821dd213db028a80cd5fca85ee2ed6 Mon Sep 17 00:00:00 2001
From: Maximilian Bosch <maximilian@mbosch.me>
Date: Tue, 8 Sep 2020 19:45:28 +0200
Subject: [PATCH] Document `allRefs` argument of `builtins.fetchTree`

---
 src/libexpr/primops/fetchTree.cc | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/libexpr/primops/fetchTree.cc b/src/libexpr/primops/fetchTree.cc
index 6e7ddde8e..133299030 100644
--- a/src/libexpr/primops/fetchTree.cc
+++ b/src/libexpr/primops/fetchTree.cc
@@ -324,6 +324,11 @@ static RegisterPrimOp primop_fetchGit({
           A Boolean parameter that specifies whether submodules should be
           checked out. Defaults to `false`.
 
+        - allRefs  
+          Whether to fetch all refs of the repository. With this argument being
+          true, it's possible to load a `rev` from *any* `ref` (by default only
+          `rev`s from the specified `ref` are supported).
+
       Here are some examples of how to use `fetchGit`.
 
         - To fetch a private repository over SSH: