diff --git a/buildbot/osuosl/master/config/schedulers.py b/buildbot/osuosl/master/config/schedulers.py
--- a/buildbot/osuosl/master/config/schedulers.py
+++ b/buildbot/osuosl/master/config/schedulers.py
@@ -3,7 +3,11 @@
 from twisted.python import log
 
 from buildbot.plugins import schedulers, util
+from buildbot.schedulers.forcesched import BaseParameter
 
+import datetime
+import json
+import urllib3
 
 # Each scheduler listens only for those projects it is interested in.
 # Every change comes with a comms-separated list of projects it
@@ -163,19 +167,78 @@
                 "}")
     return automatic_schedulers
 
+
+class BranchParameter(BaseParameter):
+    spec_attributes = ["strict", "choices"]
+    type = "list"
+    strict = True
+    required = True
+
+    def __init__(self, name="branch", default=None, **kwargs):
+        super().__init__(name, **kwargs)
+        self._default = default
+        self._choices = None
+        self._timestamp = None
+
+    def parse_from_arg(self, s):
+        return s
+
+    def __getattribute__(self, name: str):
+        if name == 'choices':
+            return self.get_choices()
+        elif name == 'default':
+            return self.get_default()
+        else:
+            return object.__getattribute__(self, name)
+
+    def get_choices(self, **kwargs):
+        now = datetime.datetime.now()
+        if (self._choices is None or self._timestamp is None or
+            (now - self._timestamp).total_seconds() > 5*60):
+            self._timestamp = now
+            http = urllib3.PoolManager(1)
+            resp = http.request("GET",
+                                "https://api.github.com/repos/llvm/llvm-project/branches",
+                                headers={"User-Agent": "Buildbot"})
+            if resp.status == 200:
+                branches = json.loads(resp.data)
+                self._choices = [b["name"] for b in branches]
+                self._choices.reverse()
+            else:
+                self._choices = [f"Error requesting llvm-project branches. "
+                                  "Got HTTP Status {resp.status}, response={resp.reason}"]
+        return self._choices
+
+    def get_default(self):
+        if self._default and self.choices and self._default in self.choices:
+            return self._default
+        if self.choices:
+            return self.choices[0]
+        return None
+
+
 def getForceSchedulers(builders):
     # TODO: Move these settings to the configuration file.
     _repourl = "https://github.com/llvm/llvm-project"
     _branch = "main"
 
     # Walk over all builders and collect their names.
+    release_builders = [
+        builder.name for builder in builders
+        if 'release' in getattr(builder, 'tags', [])
+    ]
+
     scheduler_builders = [
         builder.name for builder in builders
+        if builder.name not in release_builders
     ]
 
     # Create the force schedulers.
+    name = ["force-build-scheduler", "force-release-build-scheduler"]
+    builderNames = [scheduler_builders, release_builders]
+    defaultBranch = [_branch, None]
     return [ schedulers.ForceScheduler(
-                name            = "force-build-scheduler",
+                name            = name[i],
                 label           = "Force Build",
                 buttonName      = "Force Build",
                 reason = util.ChoiceStringParameter(
@@ -189,15 +252,13 @@
                             ],
                             default     = "Build a particular revision"
                 ),
-                builderNames    = scheduler_builders,
+                builderNames    = builderNames[i],
                 codebases       = [
                     util.CodebaseParameter(
                         codebase    = "",
-                        branch      = util.StringParameter(
-                            name        = "branch",
+                        branch      = BranchParameter(
                             label       = "branch:",
-                            size        = 64,
-                            default     = _branch
+                            default     = defaultBranch[i]
                         ),
                         revision    = util.StringParameter(
                             name        = "revision",
@@ -227,7 +288,7 @@
                         default     = False
                     )
                 ]
-            )
+            ) for i in range(2)
         ]
 
 # TODO: Abstract this kind of scheduler better.