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-rw-r--r--doc/manual/expressions/builtins.xml15
-rw-r--r--doc/manual/release-notes/release-notes.xml1
-rw-r--r--doc/manual/release-notes/rl-2.3.xml22
3 files changed, 38 insertions, 0 deletions
diff --git a/doc/manual/expressions/builtins.xml b/doc/manual/expressions/builtins.xml
index 412622714d40..dcd7aaf243ce 100644
--- a/doc/manual/expressions/builtins.xml
+++ b/doc/manual/expressions/builtins.xml
@@ -419,6 +419,13 @@ stdenv.mkDerivation { … }
               This is often a branch or tag name. Defaults to
               <literal>HEAD</literal>.
             </para>
+
+            <para>
+              By default, the <varname>ref</varname> value is prefixed
+              with <literal>refs/heads/</literal>. As of Nix 2.3.0
+              Nix will not prefix <literal>refs/heads/</literal> if
+              <varname>ref</varname> starts with <literal>refs/</literal>.
+            </para>
           </listitem>
         </varlistentry>
       </variablelist>
@@ -433,6 +440,14 @@ stdenv.mkDerivation { … }
       </example>
 
       <example>
+        <title>Fetching an arbitrary ref</title>
+        <programlisting>builtins.fetchGit {
+  url = "https://gitub.com/NixOS/nix.git";
+  ref = "refs/heads/0.5-release";
+}</programlisting>
+      </example>
+
+      <example>
         <title>Fetching a repository's specific commit on an arbitrary branch</title>
         <para>
           If the revision you're looking for is in the default branch
diff --git a/doc/manual/release-notes/release-notes.xml b/doc/manual/release-notes/release-notes.xml
index e8ff586fa43f..2655d68e354b 100644
--- a/doc/manual/release-notes/release-notes.xml
+++ b/doc/manual/release-notes/release-notes.xml
@@ -12,6 +12,7 @@
 </partintro>
 -->
 
+<xi:include href="rl-2.3.xml" />
 <xi:include href="rl-2.2.xml" />
 <xi:include href="rl-2.1.xml" />
 <xi:include href="rl-2.0.xml" />
diff --git a/doc/manual/release-notes/rl-2.3.xml b/doc/manual/release-notes/rl-2.3.xml
new file mode 100644
index 000000000000..428213b360ba
--- /dev/null
+++ b/doc/manual/release-notes/rl-2.3.xml
@@ -0,0 +1,22 @@
+<section xmlns="http://docbook.org/ns/docbook"
+      xmlns:xlink="http://www.w3.org/1999/xlink"
+      xmlns:xi="http://www.w3.org/2001/XInclude"
+      version="5.0"
+      xml:id="ssec-relnotes-2.3">
+
+<title>Release 2.3 (????-??-??)</title>
+
+<para>This release contains the following changes:</para>
+
+<itemizedlist>
+
+  <listitem>
+    <para><function>builtins.fetchGit</function>'s <varname>ref</varname>
+    argument now allows specifying an absolute remote ref.
+    Nix will automatically prefix <varname>ref</varname> with
+    <literal>refs/heads</literal> only if <varname>ref</varname> doesn't
+    already begin with <literal>refs/</literal>.
+    </para>
+  </listitem>
+</itemizedlist>
+</section>