diff --git a/doc/hgrc.5.txt b/doc/hgrc.5.txt
--- a/doc/hgrc.5.txt
+++ b/doc/hgrc.5.txt
@@ -194,7 +194,8 @@ hooks::
 
   changegroup;;
     Run after a changegroup has been added via push, pull or
-    unbundle. ID of the first new changeset is in $HG_NODE.
+    unbundle. ID of the first new changeset is in $HG_NODE.  URL from
+    which changes came is in $HG_URL.
   commit;;
     Run after a changeset has been created in the local repository.
     ID of the newly created changeset is in $HG_NODE.  Parent
@@ -202,7 +203,7 @@ hooks::
   incoming;;
     Run after a changeset has been pulled, pushed, or unbundled into
     the local repository.  The ID of the newly arrived changeset is in
-    $HG_NODE.
+    $HG_NODE.  URL that was source of changes came is in $HG_URL.
   outgoing;;
     Run after sending changes from local repository to another.  ID of
     first changeset sent is in $HG_NODE.  Source of operation is in
@@ -210,7 +211,8 @@ hooks::
   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.
+    will cause the push, pull or unbundle to fail.  URL from which
+    changes will come is in $HG_URL.
   precommit;;
     Run before starting a local commit.  Exit status 0 allows the
     commit to proceed.  Non-zero status will cause the commit to fail.
@@ -236,7 +238,8 @@ hooks::
     before accepting them.  Passed the ID of the first new changeset
     in $HG_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.
+    the push, pull or unbundle will fail.  URL that was source of
+    changes is in $HG_URL.
   pretxncommit;;
     Run after a changeset has been created but the transaction not yet
     committed.  Changeset is visible to hook program.  This lets you