fetch mrs from the emper repo

bench/emper.py

@@ -352,6 +352,24 @@ def prepare_client(data_dir: Path):
     build_emper(CLIENT_DIR)
 
 
+def repo_fetch():
+    """Fetch the emper repo"""
+    repo_fetch_all()
+    repo_fetch_mrs()
+
+
+def repo_fetch_all():
+    """Fetch all remotes in the emper repo"""
+    cmd = 'git fetch --all'.split()
+    cmd_run(cmd, log, cwd=REPO)
+
+
+def repo_fetch_mrs():
+    """Fetch all merge requests from the emper repo"""
+    cmd = 'git fetch origin refs/merge-requests/*/head:refs/remotes/origin/merge-requests/*'
+    cmd_run(cmd, log, cwd=REPO)
+
+
 def checkout_and_fetch_repo(fetch=True):
     """Clone the emper subproject and fetch it"""
     if not Path(REPO).exists():
@@ -360,8 +378,7 @@ def checkout_and_fetch_repo(fetch=True):
 
     if fetch:
         # fetch the emper repository to be sure we have the most recent version
-        emper_fetch_cmd = 'git fetch --all'
-        cmd_run(emper_fetch_cmd, log, cwd=REPO)
+        repo_fetch()
 
 
 def update_flavor(flavor_dir, checkout):