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diff --git a/Source/CTest/cmCTestGIT.h b/Source/CTest/cmCTestGIT.h
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+++ b/Source/CTest/cmCTestGIT.h
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+/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+   file Copyright.txt or https://cmake.org/licensing for details.  */
+#ifndef cmCTestGIT_h
+#define cmCTestGIT_h
+
+#include "cmConfigure.h" // IWYU pragma: keep
+
+#include "cmCTestGlobalVC.h"
+
+#include <iosfwd>
+#include <string>
+
+class cmCTest;
+
+/** \class cmCTestGIT
+ * \brief Interaction with git command-line tool
+ *
+ */
+class cmCTestGIT : public cmCTestGlobalVC
+{
+public:
+  /** Construct with a CTest instance and update log stream.  */
+  cmCTestGIT(cmCTest* ctest, std::ostream& log);
+
+  ~cmCTestGIT() override;
+
+private:
+  unsigned int CurrentGitVersion;
+  unsigned int GetGitVersion();
+  std::string GetWorkingRevision();
+  bool NoteOldRevision() override;
+  bool NoteNewRevision() override;
+  bool UpdateImpl() override;
+
+  std::string FindGitDir();
+  std::string FindTopDir();
+
+  bool UpdateByFetchAndReset();
+  bool UpdateByCustom(std::string const& custom);
+  bool UpdateInternal();
+
+  bool LoadRevisions() override;
+  bool LoadModifications() override;
+
+  // "public" needed by older Sun compilers
+public:
+  // Parsing helper classes.
+  class CommitParser;
+  class DiffParser;
+  class OneLineParser;
+
+  friend class CommitParser;
+  friend class DiffParser;
+  friend class OneLineParser;
+};
+
+#endif