diff --git a/lib/gdbcommand.py b/lib/gdbcommand.py
index ab5a837..ab6911e 100644
--- a/lib/gdbcommand.py
+++ b/lib/gdbcommand.py
@@ -30,7 +30,7 @@ class CopyOldGDBSumFile (ShellCommand):
             return SUCCESS
 
         # Switch to the right branch inside the BUILDER repo
-        switch_to_branch (builder, branch)
+        switch_to_branch (builder, branch, force_switch = True)
 
         try:
             copyfile ("%s/%s/gdb.sum" % (wb, builder),
@@ -57,7 +57,7 @@ class GdbCatSumfileCommand(ShellCommand):
             branch = 'master'
 
         # Switch to the right branch inside the BUILDER repo
-        switch_to_branch (builder, branch)
+        switch_to_branch (builder, branch, force_switch = False)
 
         parser = DejaResults()
         cur_results = parser.read_sum_text(self.getLog('stdio').getText())
diff --git a/lib/gdbgitdb.py b/lib/gdbgitdb.py
index 273f054..46ea086 100644
--- a/lib/gdbgitdb.py
+++ b/lib/gdbgitdb.py
@@ -23,7 +23,7 @@ log files of the COMMIT that was tested."""
 
     return None
 
-def switch_to_branch (builder, branch):
+def switch_to_branch (builder, branch, force_switch = False):
     """Switch (or create) to BRANCH on BUILDER repo."""
     repodir = os.path.join (get_web_base (), builder)
     repo = git.Repo.init (path = repodir)
@@ -42,7 +42,7 @@ def switch_to_branch (builder, branch):
     else:
         myhead = repo.heads[branch]
 
-    myhead.checkout (force = True)
+    myhead.checkout (force = force_switch)
 
 class SaveGDBResults (ShellCommand):
     name = 'save build results'