Add test that describes what I think is a bug in how commit source is used to find commit messages.

Author: EUROPE\n5e

src/GitVersionCore.Tests/IntegrationTests/ReleaseBranchScenarios.cs

@@ -360,4 +360,18 @@ public void MergeOnReleaseBranchShouldNotResetCount()
             fixture.AssertFullSemver(config, "2.0.0-beta.2");
         }
     }
+
+    [Test]
+    public void ReleaseBranchShouldUseBranchNameVersionDespiteBumpInPreviousCommit()
+    {
+        using (var fixture = new EmptyRepositoryFixture())
+        {
+            fixture.Repository.MakeATaggedCommit("1.0");
+            fixture.Repository.MakeACommit("+semver:major");
+
+            Commands.Checkout(fixture.Repository, fixture.Repository.CreateBranch("release/2.0"));
+
+            fixture.AssertFullSemver("2.0.0-beta.1+0");
+        }
+    }
 }