Add 'updateexternals' to synchronize externals with remote repo. To synchronize definitions in working copy .hgexternals with remote svn repository: $ hg svn updateexternals To synchronize them with .hgexternals at revision REV: $ hg svn updateexternals REV Last synchronized externals referenced are stored in .hg/svn/externals (a dump of the synchronized .hgexternals).