From 10a88fa7b0c06d6a1c7ed430939a9f372e258495 Mon Sep 17 00:00:00 2001
From: Ivan Trubach <mr.trubach@icloud.com>
Date: Wed, 18 Dec 2019 22:02:13 +0300
Subject: [PATCH] Fix gitFetch not updating FETCH_HEAD

---
 src/executil.ts  | 4 +++-
 src/installer.ts | 2 +-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/executil.ts b/src/executil.ts
index a6e325e..c78c135 100644
--- a/src/executil.ts
+++ b/src/executil.ts
@@ -43,11 +43,13 @@ export async function gitClone(gitDir: string, gitRepo: string, workTree: string
   await git(args);
 }
 
-export async function gitFetch(gitDir: string) {
+export async function gitFetch(gitDir: string, ref: string) {
   let args: string[] = [
     `--git-dir=${gitDir}`,
     'fetch',
     '--depth=1',
+    'origin',
+    ref,
   ];
   await git(args);
 }
diff --git a/src/installer.ts b/src/installer.ts
index e6dcc0f..bb18d7a 100644
--- a/src/installer.ts
+++ b/src/installer.ts
@@ -85,7 +85,7 @@ async function acquireGo(version: string, gotipRef: string, bootstrapGo: string)
         workTree = '';
 
         // Cache hit for git dir, fetch new commits from upstream.
-        await executil.gitFetch(gitDir);
+        await executil.gitFetch(gitDir, gotipRef);
 
         // Extract latest commit hash.
         commitHash = await executil.gitRevParse(gitDir, 'FETCH_HEAD');