diff --git a/scm-plugins/scm-git-plugin/src/main/java/sonia/scm/repository/spi/GitBranchesCommand.java b/scm-plugins/scm-git-plugin/src/main/java/sonia/scm/repository/spi/GitBranchesCommand.java
index 81b38cab5c..ed0ac772f1 100644
--- a/scm-plugins/scm-git-plugin/src/main/java/sonia/scm/repository/spi/GitBranchesCommand.java
+++ b/scm-plugins/scm-git-plugin/src/main/java/sonia/scm/repository/spi/GitBranchesCommand.java
@@ -37,7 +37,6 @@ package sonia.scm.repository.spi;
 import com.google.common.annotations.VisibleForTesting;
 import com.google.common.base.Strings;
 import org.checkerframework.checker.nullness.qual.Nullable;
-import org.checkerframework.common.value.qual.UnknownVal;
 import org.eclipse.jgit.api.Git;
 import org.eclipse.jgit.api.errors.GitAPIException;
 import org.eclipse.jgit.lib.Ref;
@@ -118,8 +117,8 @@ public class GitBranchesCommand extends AbstractGitCommand implements BranchesCo
     }
   }
 
-  @UnknownVal
   Optional<Ref> getRepositoryHeadRef(Git git) {
     return GitUtil.getRepositoryHeadRef(git.getRepository());
   }
 }
+
diff --git a/scm-plugins/scm-git-plugin/src/test/java/sonia/scm/repository/spi/GitBranchesCommandTest.java b/scm-plugins/scm-git-plugin/src/test/java/sonia/scm/repository/spi/GitBranchesCommandTest.java
index af765bc7aa..1c737deab8 100644
--- a/scm-plugins/scm-git-plugin/src/test/java/sonia/scm/repository/spi/GitBranchesCommandTest.java
+++ b/scm-plugins/scm-git-plugin/src/test/java/sonia/scm/repository/spi/GitBranchesCommandTest.java
@@ -1,6 +1,5 @@
 package sonia.scm.repository.spi;
 
-import org.checkerframework.common.value.qual.UnknownVal;
 import org.eclipse.jgit.api.Git;
 import org.eclipse.jgit.api.ListBranchCommand;
 import org.eclipse.jgit.api.errors.GitAPIException;
@@ -57,7 +56,7 @@ class GitBranchesCommandTest {
       }
 
       @Override
-      @UnknownVal Optional<Ref> getRepositoryHeadRef(Git git) {
+      Optional<Ref> getRepositoryHeadRef(Git git) {
         return of(master);
       }
     };