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+Problem statement:
+
+we want fast local processing in case of no changes, and we want working processing with GitHub Actions
+
+GitHub Actions are executed with fresh clone and git does not carry timestamps this is creating challenges for us.
+
+See https://git.wiki.kernel.org/index.php/Git_FAQ#Why_isn.27t_Git_preserving_modification_time_on_files.3F
+
+See https://stackoverflow.com/questions/2179722/checking-out-old-file-with-original-create-modified-timestamps
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