diff --git a/autoload/fugitive.vim b/autoload/fugitive.vim
index 167cfb6..8b5b399 100644
--- a/autoload/fugitive.vim
+++ b/autoload/fugitive.vim
@@ -1598,11 +1598,20 @@ function! fugitive#repo(...) abort
 endfunction
 
 function! s:repo_dir(...) dict abort
-  throw 'fugitive: fugitive#repo().dir() has been replaced by FugitiveGitDir()'
+  if !a:0
+    return self.git_dir
+  endif
+  throw 'fugitive: fugitive#repo().dir("...") has been replaced by FugitiveFind(".git/...")'
 endfunction
 
 function! s:repo_tree(...) dict abort
-  throw 'fugitive: fugitive#repo().tree() has been replaced by FugitiveFind(":/")'
+  let tree = s:Tree(self.git_dir)
+  if empty(tree)
+    throw 'fugitive: no work tree'
+  elseif !a:0
+    return tree
+  endif
+  throw 'fugitive: fugitive#repo().tree("...") has been replaced by FugitiveFind(":(top)...")'
 endfunction
 
 function! s:repo_bare() dict abort
@@ -1628,11 +1637,11 @@ function! s:repo_git_command(...) dict abort
 endfunction
 
 function! s:repo_git_chomp(...) dict abort
-  throw 'fugitive: fugitive#repo().git_chomp(...) has been replaced by FugitiveExecute(...).stdout'
+  silent return substitute(system(fugitive#ShellCommand(a:000, self.git_dir)), '\n$', '', '')
 endfunction
 
 function! s:repo_git_chomp_in_tree(...) dict abort
-  throw 'fugitive: fugitive#repo().git_chomp_in_tree(...) has been replaced by FugitiveExecute(...).stdout'
+  return call(self.git_chomp, a:000, self)
 endfunction
 
 function! s:repo_rev_parse(rev) dict abort
@@ -1642,7 +1651,7 @@ endfunction
 call s:add_methods('repo',['git_command','git_chomp','git_chomp_in_tree','rev_parse'])
 
 function! s:repo_config(name) dict abort
-  throw 'fugitive: fugitive#repo().config(...) has been replaced by FugitiveConfigGet(...)'
+  return FugitiveConfigGet(a:name, self.git_dir)
 endfunction
 
 call s:add_methods('repo',['config'])