Modify access rules

groups

diff --git a/groups b/groups
index ed0a526..ba03083 100644
--- a/groups
+++ b/groups
@@ -8,3 +8,4 @@
 mdb:copybara-git-writers	mdb/copybara-git-writers
 mdb:quiche-dev          	mdb/quiche-dev
 mdb:quiche-dev-git-admin	mdb/quiche-dev-git-admin
+mdb:quiche-roll-branches	mdb/quiche-roll-branches

project.config

diff --git a/project.config b/project.config
index bb1d121..2cad5cb 100644
--- a/project.config
+++ b/project.config
@@ -69,9 +69,13 @@
 	copyCondition = changekind:NO_CHANGE OR changekind:TRIVIAL_REBASE OR is:MIN
 [access "refs/heads/roll/*"]
 	create = group mdb/quiche-dev
+	create = group mdb/quiche-roll-branches
 	push = group mdb/quiche-dev
+	push = group mdb/quiche-roll-branches
 	pushMerge = group mdb/quiche-dev
+	pushMerge = group mdb/quiche-roll-branches
 	delete = group mdb/quiche-dev
+	delete = group mdb/quiche-roll-branches
 [access "refs/heads/interop/*"]
 	create = group mdb/quiche-dev
 	delete = group mdb/quiche-dev