fix: remove deprecated pygit2 method usage

Signed-off-by: David van der Spek <david.vanderspek@flyrlabs.com>

Author: davidspek

packages/opal-server/opal_server/git_fetcher.py

@@ -64,9 +64,9 @@ def create_local_branch_ref(
             else:
                 raise RuntimeError("Base branch was not found on remote")
             logger.debug(
-                f"Created local branch '{branch_name}', pointing to: {commit.hex}"
+                f"Created local branch '{branch_name}', pointing to: {str(commit.id)}"
             )
-            return repo.create_reference(f"refs/heads/{branch_name}", commit.hex)
+            return repo.create_reference(f"refs/heads/{branch_name}", str(commit.id))
         else:
             logger.debug(
                 f"No need to create local branch '{branch_name}': already exists!"
@@ -92,7 +92,7 @@ def get_local_branch(repo: Repository, branch: str) -> Optional[pygit2.Reference
     def get_commit_hash(repo: Repository, branch: str, remote: str) -> Optional[str]:
         try:
             (commit, _) = repo.resolve_refish(f"{remote}/{branch}")
-            return commit.hex
+            return str(commit.id)
         except (pygit2.GitError, KeyError):
             return None
 
@@ -104,7 +104,7 @@ def get_tag_commit_hash(repo: Repository, tag_name: str) -> Optional[str]:
             # If the tag is annotated, dereference to the commit
             if commit.type == pygit2.GIT_OBJECT_TAG:
                 commit = commit.peel(pygit2.Commit)
-            return commit.hex
+            return str(commit.id)
         except (KeyError, pygit2.GitError):
             return None
 
@@ -373,7 +373,7 @@ async def _notify_on_changes(self, repo: Repository):
                     repo, self.local_branch_name, self._remote, self._source.branch
                 )
         else:
-            old_revision = local_branch.target.hex
+            old_revision = str(local_branch.target)
 
         await self.callbacks.on_update(old_revision, new_revision)