Fix branch updating and caching

Author: therazix

src/tmt_web/utils/git_handler.py

@@ -6,6 +6,7 @@
 It uses tmt's Git utilities for robust clone operations with retry logic.
 """
 
+import hashlib
 import re
 from shutil import rmtree
 
@@ -20,15 +21,22 @@
 ROOT_DIR = Path(__file__).resolve().parents[2]
 
 
+def create_hash(text: str):
+    """Create SHA-1 hash of the given text that is consistent across runs."""
+    hashed_url = hashlib.new("sha1", usedforsecurity=False)
+    hashed_url.update(text.encode())
+    return hashed_url.hexdigest()
+
+
 def get_unique_clone_path(url: str) -> Path:
     """
     Generate a unique path for cloning a repository.
 
     :param url: Repository URL
     :return: Unique path for cloning
     """
-    url = url.rstrip("/")
-    clone_dir_name = str(abs(hash(url)))
+    url = url.rstrip("/").removesuffix(".git")
+    clone_dir_name = create_hash(url)
     return ROOT_DIR / settings.CLONE_DIR_PATH / clone_dir_name
 
 
@@ -136,7 +144,18 @@ def _get_default_branch(common: Common, repo_path: Path, logger: Logger) -> str:
 def _fetch_remote(common: Common, repo_path: Path, logger: Logger) -> None:
     """Fetch updates from the remote repository."""
     try:
-        common.run(Command("git", "fetch"), cwd=repo_path)
+        common.run(
+            Command(
+                "git",
+                "fetch",
+                "origin",
+                "--prune",
+                "--prune-tags",
+                "+refs/heads/*:refs/remotes/origin/*",
+                "+refs/tags/*:refs/tags/*",
+            ),
+            cwd=repo_path,
+        )
     except RunError as err:
         logger.fail(f"Failed to fetch remote for repository '{repo_path}'")
         raise GeneralError(f"Failed to fetch remote for repository '{repo_path}'") from err