graphlog: support changeset identifiers in --branch

hgext/graphlog.py

@@ -306,6 +306,7 b' def _makelogrevset(repo, pats, opts, rev'
     # branch and only_branch are really aliases and must be handled at
     # the same time
     opts['branch'] = opts.get('branch', []) + opts.get('only_branch', [])
+    opts['branch'] = [repo.lookupbranch(b) for b in opts['branch']]
     # pats/include/exclude are passed to match.match() directly in
     # _matchfile() revset but walkchangerevs() builds its matcher with
     # scmutil.match(). The difference is input pats are globbed on

tests/test-glog.t

@@ -1464,7 +1464,7 b' glog always reorders nodes which explain'
   abort: unknown revision 'not-a-branch'!
   abort: unknown revision 'not-a-branch'!
   abort: unknown revision 'not-a-branch'!
-  $ testlog -b default -b branch --only-branch branch
+  $ testlog -b 35 -b 36 --only-branch branch
   []
   (group
     (group