diff --git a/doc/hgrc.5.txt b/doc/hgrc.5.txt
--- a/doc/hgrc.5.txt
+++ b/doc/hgrc.5.txt
@@ -146,8 +146,8 @@ hooks::
     incoming.autobuild = /my/build/hook
 
   changegroup;;
-    Run after a changegroup has been added via push or pull. Passed
-    the ID of the first new changeset in $NODE.
+    Run after a changegroup has been added via push, pull or
+    unbundle. Passed the ID of the first new changeset in $NODE.
   commit;;
     Run after a changeset has been created in the local repository.
     Passed the ID of the newly created changeset in environment
@@ -156,6 +156,10 @@ hooks::
     Run after a changeset has been pulled, pushed, or unbundled into
     the local repository.  Passed the ID of the newly arrived
     changeset in environment variable $NODE.
+  prechangegroup;;
+    Run before a changegroup is added via push, pull or unbundle.
+    Exit status 0 allows the changegroup to proceed.  Non-zero status
+    will cause the push, pull or unbundle to fail.
   precommit;;
     Run before starting a local commit.  Exit status 0 allows the
     commit to proceed.  Non-zero status will cause the commit to
@@ -165,6 +169,14 @@ hooks::
     created.  Non-zero status will cause the tag to fail.  ID of
     changeset to tag in $NODE.  Name of tag in $TAG.  Tag is local if
     $LOCAL=1, in repo if $LOCAL=0.
+  pretxnchangegroup;;
+    Run after a changegroup has been added via push, pull or unbundle,
+    but before the transaction has been committed.  Changegroup is
+    visible to hook program.  This lets you validate incoming changes
+    before accepting them.  Passed the ID of the first new changeset
+    in $NODE.  Exit status 0 allows the transaction to commit.
+    Non-zero status will cause the transaction to be rolled back and
+    the push, pull or unbundle will fail.
   pretxncommit;;
     Run after a changeset has been created but the transaction not yet
     committed.  Changeset is visible to hook program.  This lets you