fix(ci): make RPM source tarball independent of git metadata

Author: Sopwit

.github/workflows/ci.yml

@@ -83,11 +83,11 @@ jobs:
           fi
           ARCHIVE_BASENAME="ro-control-${VERSION}"
           mkdir -p ~/rpmbuild/SOURCES
-          git archive \
-            --format=tar.gz \
-            --prefix="${ARCHIVE_BASENAME}/" \
-            --output="${HOME}/rpmbuild/SOURCES/${ARCHIVE_BASENAME}.tar.gz" \
-            HEAD
+          STAGE_DIR="$(mktemp -d)"
+          cp -a . "${STAGE_DIR}/${ARCHIVE_BASENAME}"
+          rm -rf "${STAGE_DIR}/${ARCHIVE_BASENAME}/.git" "${STAGE_DIR}/${ARCHIVE_BASENAME}/build"
+          tar -C "${STAGE_DIR}" -czf "${HOME}/rpmbuild/SOURCES/${ARCHIVE_BASENAME}.tar.gz" "${ARCHIVE_BASENAME}"
+          rm -rf "${STAGE_DIR}"
 
       - name: Build RPM
         run: |