diff --git a/common/lib/dependabot/git_commit_checker.rb b/common/lib/dependabot/git_commit_checker.rb
index 3ccfbd21093..bc62cfb459a 100644
--- a/common/lib/dependabot/git_commit_checker.rb
+++ b/common/lib/dependabot/git_commit_checker.rb
@@ -49,8 +49,14 @@ def pinned?
       return true if branch
       return true if dependency.version&.start_with?(ref)
 
-      # Check the specified `ref` isn't actually a branch
-      !local_upload_pack.match?(%r{ refs/heads/#{ref}$})
+      # If the specified `ref` is actually a tag, we're pinned
+      return true if local_upload_pack.match?(%r{ refs/tags/#{ref}$})
+
+      # If the specified `ref` is actually a branch, we're NOT pinned
+      return false if local_upload_pack.match?(%r{ refs/heads/#{ref}$})
+
+      # Otherwise, assume we're pinned
+      true
     end
 
     def pinned_ref_looks_like_version?
diff --git a/github_actions/spec/dependabot/github_actions/update_checker_spec.rb b/github_actions/spec/dependabot/github_actions/update_checker_spec.rb
index b5bce5c61c8..34d4b1d8c3d 100644
--- a/github_actions/spec/dependabot/github_actions/update_checker_spec.rb
+++ b/github_actions/spec/dependabot/github_actions/update_checker_spec.rb
@@ -243,6 +243,12 @@
         end
       end
 
+      context "and the latest version being also a branch" do
+        let(:upload_pack_fixture) { "msbuild" }
+
+        it { is_expected.to eq(Dependabot::GithubActions::Version.new("1.1.3")) }
+      end
+
       context "that is a major-only tag of the the latest version" do
         let(:reference) { "v1" }
         it { is_expected.to eq(Dependabot::GithubActions::Version.new("v1")) }
diff --git a/github_actions/spec/fixtures/git/upload_packs/msbuild b/github_actions/spec/fixtures/git/upload_packs/msbuild
new file mode 100644
index 00000000000..34d7efaf780
--- /dev/null
+++ b/github_actions/spec/fixtures/git/upload_packs/msbuild
@@ -0,0 +1,68 @@
+001e# service=git-upload-pack
+000001560b44c6745b7e81956596964100aadb92d667c497 HEAD multi_ack thin-pack side-band side-band-64k ofs-delta shallow deepen-since deepen-not deepen-relative no-progress include-tag multi_ack_detailed allow-tip-sha1-in-want allow-reachable-sha1-in-want no-done symref=HEAD:refs/heads/master filter object-format=sha1 agent=git/github-gcaaf1c4b6630
+005b0fc2502ca49f277016260bdd89c70e0c16a7cf4e refs/heads/dependabot/npm_and_yarn/ajv-6.12.6
+006db7835cef05cc81bdb8c67ea14346cdcd7c89fd81 refs/heads/dependabot/npm_and_yarn/json-schema-and-jsprim-0.4.0
+005b1d97ad85a9755ff291da008c63fe2b08238535e5 refs/heads/dependabot/npm_and_yarn/tmpl-1.0.5
+003c6a8fedefe94395d1c2193b87c6d83224d6e87569 refs/heads/dev
+003f0b44c6745b7e81956596964100aadb92d667c497 refs/heads/master
+003ffc16ae6170877cd889e5d735ea9d41c2362078b2 refs/heads/v1.0.0
+003f8dc49dbd173d2e84b142c0b65eef06ad36ccc82c refs/heads/v1.0.1
+003fc26a08ba26249b81327e26f6ef381897b6a8754d refs/heads/v1.0.2
+003f9546707e6b8f513d3a2af998e51e3b995c9fbe81 refs/heads/v1.0.3
+003fab534842b4bdf384b8aaf93765dc6f721d9f5fab refs/heads/v1.1.0
+003fb381dbabab030b2d16c2c87be6e0fdfadb75628a refs/heads/v1.1.1
+003fd6496d378fd258c01b23231ffff1e73808f126e7 refs/heads/v1.1.2
+003f34cfbaee7f672c76950673338facd8a73f637506 refs/heads/v1.1.3
+003e2008f912f56e61277eefaac6d1888b750582aa16 refs/pull/1/head
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+003f34cfbaee7f672c76950673338facd8a73f637506 refs/tags/v1.1^{}
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+004134cfbaee7f672c76950673338facd8a73f637506 refs/tags/v1.1.3^{}
+0000