diff --git a/terrarium/dl_gitmanager/dl_gitmanager/git_manager.py b/terrarium/dl_gitmanager/dl_gitmanager/git_manager.py
index a9a00a503..93cf89932 100644
--- a/terrarium/dl_gitmanager/dl_gitmanager/git_manager.py
+++ b/terrarium/dl_gitmanager/dl_gitmanager/git_manager.py
@@ -12,6 +12,9 @@
 from git.repo.base import Repo as GitRepo
 
 
+MAX_HISTORY_DEPTH = 300
+
+
 @attr.s
 class GitManager:
     git_repo: GitRepo = attr.ib(kw_only=True)
@@ -133,7 +136,7 @@ def get_list_diff_paths(self, commits: Collection[str], absolute: bool = False)
         return self._collect_paths_from_diffs(diff_iterable=self._iter_list_diffs(commits=commits, absolute=absolute))
 
     def get_all_ancestor_commits(self, commit: str) -> set[str]:
-        commits = [commit.hexsha for commit in self.git_repo.iter_commits(commit)]
+        commits = [commit.hexsha for commit in self.git_repo.iter_commits(commit, max_count=MAX_HISTORY_DEPTH)]
         return set(commits)
 
     def get_missing_commits(self, base: str, head: str) -> set[str]: