Revert "[sdk] Ensure branch HEAD is fetched locally"

This reverts commit a8be45c1ce84014ad73b865b3e25d4ed2116f2fe.

Reason for revert: Same reason we reverted on master.

Original change's description:
> [sdk] Ensure branch HEAD is fetched locally
>
> This should fix flakes like go/bbid/8853799753680230336.
>
> Change-Id: Ic588429542e43b53fc2ba1d279f3b5312d0c2d1b
> Reviewed-on: https://fuchsia-review.googlesource.com/c/infra/recipes/+/495362
> Reviewed-by: Gary Boone <gboone@google.com>
> Commit-Queue: Anthony Fandrianto <atyfto@google.com>
> (cherry picked from commit 1ac2a811704bba7a2a2c99a976a09b8a4a4c9e2b)
> Reviewed-on: https://fuchsia-review.googlesource.com/c/infra/recipes/+/495880

Change-Id: Ic56ddf6de2d7719d6eb82c7011871e9a49013e4e
Reviewed-on: https://fuchsia-review.googlesource.com/c/infra/recipes/+/497058
Reviewed-by: Anthony Fandrianto <atyfto@google.com>
diff --git a/recipes/sdk.expected/release_ci.json b/recipes/sdk.expected/release_ci.json
index 731d606..7bc7436 100644
--- a/recipes/sdk.expected/release_ci.json
+++ b/recipes/sdk.expected/release_ci.json
@@ -274,15 +274,6 @@
   {
     "cmd": [
       "git",
-      "fetch",
-      "origin",
-      "h3ll0"
-    ],
-    "name": "git fetch"
-  },
-  {
-    "cmd": [
-      "git",
       "--no-pager",
       "tag",
       "--merged",
diff --git a/recipes/sdk.expected/release_ci_image_failure.json b/recipes/sdk.expected/release_ci_image_failure.json
index 3f7e2ea..d13d386 100644
--- a/recipes/sdk.expected/release_ci_image_failure.json
+++ b/recipes/sdk.expected/release_ci_image_failure.json
@@ -274,15 +274,6 @@
   {
     "cmd": [
       "git",
-      "fetch",
-      "origin",
-      "h3ll0"
-    ],
-    "name": "git fetch"
-  },
-  {
-    "cmd": [
-      "git",
       "--no-pager",
       "tag",
       "--merged",
diff --git a/recipes/sdk.expected/release_ci_new_upload.json b/recipes/sdk.expected/release_ci_new_upload.json
index 977993d..fbad398 100644
--- a/recipes/sdk.expected/release_ci_new_upload.json
+++ b/recipes/sdk.expected/release_ci_new_upload.json
@@ -274,15 +274,6 @@
   {
     "cmd": [
       "git",
-      "fetch",
-      "origin",
-      "h3ll0"
-    ],
-    "name": "git fetch"
-  },
-  {
-    "cmd": [
-      "git",
       "--no-pager",
       "tag",
       "--merged",
diff --git a/recipes/sdk.expected/release_ci_no_update_ref.json b/recipes/sdk.expected/release_ci_no_update_ref.json
index 54120b1..11474f9 100644
--- a/recipes/sdk.expected/release_ci_no_update_ref.json
+++ b/recipes/sdk.expected/release_ci_no_update_ref.json
@@ -274,15 +274,6 @@
   {
     "cmd": [
       "git",
-      "fetch",
-      "origin",
-      "h3ll0"
-    ],
-    "name": "git fetch"
-  },
-  {
-    "cmd": [
-      "git",
       "--no-pager",
       "tag",
       "--merged",
diff --git a/recipes/sdk.py b/recipes/sdk.py
index b35bdd3c..0da4db9 100644
--- a/recipes/sdk.py
+++ b/recipes/sdk.py
@@ -176,7 +176,6 @@
         branch_head = api.git.get_remote_branch_head(
             api.sso.sso_to_https(remote), settings.branch
         )
-        api.git.fetch("origin", refspec=branch_head)
         if release_version in api.release.get_release_versions(
             ref=branch_head, repo_path=integration_repo
         ):