diff --git a/newsfragments/277.feature b/newsfragments/277.feature
new file mode 100644
index 00000000..ffb726d8
--- /dev/null
+++ b/newsfragments/277.feature
@@ -0,0 +1,2 @@
+Skip fork repos earlier in main branch bot, for better performance in organisations
+with a large number of forks.
diff --git a/src/oca_github_bot/tasks/main_branch_bot.py b/src/oca_github_bot/tasks/main_branch_bot.py
index ccf74d8f..184eee4a 100644
--- a/src/oca_github_bot/tasks/main_branch_bot.py
+++ b/src/oca_github_bot/tasks/main_branch_bot.py
@@ -153,6 +153,8 @@ def main_branch_bot(org, repo, branch, build_wheels, dry_run=False):
 def main_branch_bot_all_repos(org, build_wheels, dry_run=False):
     with github.login() as gh:
         for repo in gh.repositories_by(org):
+            if repo.fork:
+                continue
             for branch in repo.branches():
                 if not is_main_branch_bot_branch(branch):
                     continue