diff --git a/github_scripts/get_git_sources.py b/github_scripts/get_git_sources.py
index f9fe168e..ffee9652 100644
--- a/github_scripts/get_git_sources.py
+++ b/github_scripts/get_git_sources.py
@@ -19,6 +19,19 @@
 logger = logging.getLogger(__name__)
 
 
+class SubprocessRunError(Exception):
+    def __init__(self, command, returncode, stdout, stderr):
+        self.command = command
+        self.returncode = returncode
+        self.stdout = stdout
+        self.stderr = stderr
+        self.message = (
+            f"Errorcode {returncode} raised when running command '{command}\n\n"
+            f"stdout:\n{stdout}\n\nstderr:\n{stderr}"
+        )
+        super().__init__(self.message)
+
+
 def run_command(
     command: str, check: bool = True, capture: bool = True, timeout: int = 600
 ) -> Optional[subprocess.CompletedProcess]:
@@ -44,8 +57,8 @@ def run_command(
         if check and result.returncode != 0:
             err_msg = (result.stderr or "").strip()
             logger.error(f"[FAIL] Command failed: {command}\nError: {err_msg}")
-            raise subprocess.CalledProcessError(
-                result.returncode, args, output=result.stdout, stderr=result.stderr
+            raise SubprocessRunError(
+                result.returncode, command, result.stdout, result.stderr
             )
         return result
 
@@ -198,14 +211,14 @@ def merge_source(
 
     run_command(f"git -C {dest} fetch local {fetch}")
 
-    command = f"git -C {dest} merge --no-gpg-sign FETCH_HEAD"
+    command = f"git -C {dest} merge --no-gpg-sign --no-edit FETCH_HEAD"
     result = run_command(command, check=False)
     if result.returncode:
         unmerged_files = get_unmerged(dest)
         if unmerged_files:
             handle_merge_conflicts(source, ref, dest, dest.name)
         else:
-            raise subprocess.CalledProcessError(
+            raise SubprocessRunError(
                 result.returncode, command, result.stdout, result.stderr
             )
 
diff --git a/github_scripts/merge_sources.py b/github_scripts/merge_sources.py
index acb63c22..9f884911 100755
--- a/github_scripts/merge_sources.py
+++ b/github_scripts/merge_sources.py
@@ -32,6 +32,7 @@ def parse_args():
     parser.add_argument(
         "-p",
         "--path",
+        type=Path,
         default=None,
         help="The path to extract the sources to. If part of a cylc suite, it will "
         "default to $CYLC_WORKFLOW_SHARE_DIR/source, otherwise __file__/source",
diff --git a/github_scripts/suite_report_git.py b/github_scripts/suite_report_git.py
index 5bf32254..340110c4 100755
--- a/github_scripts/suite_report_git.py
+++ b/github_scripts/suite_report_git.py
@@ -238,7 +238,7 @@ def create_um_config_owner_table(self, owners: Dict) -> None:
         # Create a dict with owners as the key
         table_dict = defaultdict(list)
         for config in failed_configs:
-            owner, others = owners[config]
+            owner, others = owners.get(config, "UNKNOWN")
             if others != "--":
                 config = f"{config} ({others})"
             table_dict[owner].append(config)