diff --git a/src/bin/centpkg-sig b/src/bin/centpkg-sig
old mode 100644
new mode 100755
diff --git a/src/centpkg-sig.conf b/src/centpkg-sig.conf
index 0e9ac51..e75eb01 100644
--- a/src/centpkg-sig.conf
+++ b/src/centpkg-sig.conf
@@ -1,7 +1,10 @@
 [centpkg-sig]
 lookaside = https://git.centos.org/sources
 lookasidehash = sha512
-lookaside_cgi = https://git.centos.org/sources/upload.cgi
+lookaside_cgi = https://git.centos.org/sources/upload_sig.cgi
+# lookaside_cgi = https://git.centos.org/sources/upload.cgi
+lookaside_structure = hash
+# lookaside_structure = branch
 distgit_namespaced = True
 distgit_namespaces = rpms
 gitbaseurl = ssh://git@git.centos.org/%(repo)s.git
diff --git a/src/centpkg/__init__.py b/src/centpkg/__init__.py
index 8653930..8e7ba4e 100644
--- a/src/centpkg/__init__.py
+++ b/src/centpkg/__init__.py
@@ -151,6 +151,11 @@ class Commands(Commands):
         # should only be used when configured for SHA512
         self.source_entry_type = 'bsd' if self.lookasidehash != 'md5' else 'old'
         self.branchre = 'c\d{1,}(s)?(tream)?|master'
+        self.lookaside_structure = None
+
+    def update(self, config):
+        if self.lookaside_structure is None:
+            self.lookaside_structure = config.get('lookaside_structure', 'hash')
 
     @property
     def distgitdir(self):
@@ -168,7 +173,8 @@ class Commands(Commands):
                                      self.lookaside,
                                      self.lookaside_cgi,
                                      self.repo_name,
-                                     self.branch_merge)
+                                     self.branch_merge,
+                                     structure=self.lookaside_structure)
 
     # redefined loaders
     def load_rpmdefines(self):
diff --git a/src/centpkg/cli.py b/src/centpkg/cli.py
index 61202fb..faebb0d 100755
--- a/src/centpkg/cli.py
+++ b/src/centpkg/cli.py
@@ -35,6 +35,11 @@ class centpkgClient(cliClient):
 
         self.setup_centos_subparsers()
 
+    def load_cmd(self):
+        super(centpkgClient, self).load_cmd()
+        cfg = self.config[self.get_name()]
+        self._cmd.update(cfg)
+
     def setup_centos_subparsers(self):
         self.register_do_fork()
         self.register_request_gated_side_tag()
diff --git a/src/centpkg/lookaside.py b/src/centpkg/lookaside.py
index 04735e5..9565ddb 100644
--- a/src/centpkg/lookaside.py
+++ b/src/centpkg/lookaside.py
@@ -94,7 +94,7 @@ class StreamLookasideCache(CGILookasideCache):
         return super(StreamLookasideCache, self).remote_file_exists(
                 _name, filename, hashstr)
 
-    def upload(self, name, filename, hashstr, offline=False):
+    def upload(self, name, filename, hashstr, offline=False, **kwargs):
         """
         Uploads a file to lookaside cache.
 
@@ -169,13 +169,32 @@ class StreamLookasideCache(CGILookasideCache):
 
 
 class SIGLookasideCache(CGILookasideCache):
-    def __init__(self, hashtype, download_url, upload_url, name, branch):
+    def __init__(self, hashtype, download_url, upload_url, name, branch, structure='hash'):
         super(SIGLookasideCache, self).__init__(
             hashtype, download_url, upload_url, client_cert="/home/bstinson/.centos.cert")
+        
+        self.name = name
         self.branch = branch
-
-        self.download_path = (
-            '%(name)s/%(branch)s/%(hash)s')
+        self.structure = structure
+
+    @property
+    def download_path(self):
+        if self.structure == 'hash':
+            return '%(name)s/%(filename)s/%(hashtype)s/%(hash)s'
+        return '%(name)s/%(branch)s/%(hash)s'
+
+    def get_download_url(self, name, filename, hash, hashtype=None, **kwargs):
+        if self.structure == 'hash':
+            path_dict = {
+                'name': name,
+                'filename': filename,
+                'hash': hash,
+                'hashtype': hashtype
+            }
+            path = self.download_path % path_dict
+            return os.path.join(self.download_url, path)
+        
+        return super(SIGLookasideCache, self).get_download_url(name, filename, hash, hashtype, **kwargs)
 
     def remote_file_exists(self, name, filename, hash):
         """Verify whether a file exists on the lookaside cache
@@ -201,8 +220,9 @@ class SIGLookasideCache(CGILookasideCache):
 
         post_data = [('name', _name),
                      ('%ssum' % self.hashtype, hash),
-                     ('branch', self.branch),
                      ('filename', filename)]
+        if self.structure == 'branch':
+            post_data.append(('branch', self.branch))
 
         with io.BytesIO() as buf:
             c = pycurl.Curl()
@@ -279,8 +299,9 @@ class SIGLookasideCache(CGILookasideCache):
         self.log.info("Uploading: %s", filepath)
         post_data = [('name', name),
                      ('%ssum' % self.hashtype, hash),
-                     ('branch', self.branch),
                      ('file', (pycurl.FORM_FILE, filepath))]
+        if self.structure == 'branch':
+            post_data.append(('branch', self.branch))
 
         with io.BytesIO() as buf:
             c = pycurl.Curl()