diff --git a/README.md b/README.md
index cf12b26..92e2b2a 100644
--- a/README.md
+++ b/README.md
@@ -94,7 +94,6 @@ Reload .vimrc and `:PlugInstall` to install plugins.
 | `g:plug_threads`    | 16                                | Default number of threads to use                       |
 | `g:plug_timeout`    | 60                                | Time limit of each task in seconds (*Ruby & Python*)   |
 | `g:plug_retries`    | 2                                 | Number of retries in case of timeout (*Ruby & Python*) |
-| `g:plug_shallow`    | 1                                 | Use shallow clone                                      |
 | `g:plug_window`     | `vertical topleft new`            | Command to open plug window                            |
 | `g:plug_url_format` | `https://git::@github.com/%s.git` | `printf` format to build repo URL                      |
 
diff --git a/plug.vim b/plug.vim
index 925d19d..a2e057f 100644
--- a/plug.vim
+++ b/plug.vim
@@ -763,9 +763,6 @@ function! s:update_impl(pull, force, args) abort
   call append(0, ['', ''])
   normal! 2G
 
-  let s:clone_opt = get(g:, 'plug_shallow', 1) ?
-        \ '--depth 1' . (s:git_version_requirement(1, 7, 10) ? ' --no-single-branch' : '') : ''
-
   " Python version requirement (>= 2.7)
   if s:py2 && !s:ruby && !s:nvim && s:update.threads > 1
     redir => pyv
@@ -982,8 +979,7 @@ while 1 " Without TCO, Vim stack is bound to explode
     endif
   else
     call s:spawn(name,
-          \ printf('git clone %s %s --recursive %s -b %s %s 2>&1',
-          \ s:clone_opt,
+          \ printf('git clone %s --recursive %s -b %s %s 2>&1',
           \ prog,
           \ s:shellesc(spec.uri),
           \ checkout,
@@ -1020,7 +1016,6 @@ import vim
 G_PULL = vim.eval('s:update.pull') == '1'
 G_RETRIES = int(vim.eval('get(g:, "plug_retries", 2)')) + 1
 G_TIMEOUT = int(vim.eval('get(g:, "plug_timeout", 60)'))
-G_CLONE_OPT = vim.eval('s:clone_opt')
 G_PROGRESS = vim.eval('s:progress_opt(1)')
 G_LOG_PROB = 1.0 / int(vim.eval('s:update.threads'))
 G_STOP = thr.Event()
@@ -1242,8 +1237,8 @@ class Plugin(object):
 
     self.write(Action.INSTALL, self.name, ['Installing ...'])
     callback = functools.partial(self.buf.write, Action.INSTALL, self.name)
-    cmd = 'git clone {0} {1} --recursive {2} -b {3} {4} 2>&1'.format(
-        G_CLONE_OPT, G_PROGRESS, self.args['uri'], self.checkout, esc(target))
+    cmd = 'git clone {0} --recursive {1} -b {2} {3} 2>&1'.format(
+        G_PROGRESS, self.args['uri'], self.checkout, esc(target))
     com = Command(cmd, None, G_TIMEOUT, G_RETRIES, callback, clean(target))
     result = com.attempt_cmd()
     self.write(Action.DONE, self.name, result[-1:])
@@ -1538,7 +1533,6 @@ function! s:update_ruby()
     end
   } if VIM::evaluate('s:mac_gui') == 1
 
-  clone_opt = VIM::evaluate('s:clone_opt')
   progress = VIM::evaluate('s:progress_opt(1)')
   nthr.times do
     mtx.synchronize do
@@ -1576,7 +1570,7 @@ function! s:update_ruby()
             else
               d = esc dir.sub(%r{[\\/]+$}, '')
               log.call name, 'Installing ...', :install
-              bt.call "git clone #{clone_opt} #{progress} --recursive #{uri} -b #{checkout} #{d} 2>&1", name, :install, proc {
+              bt.call "git clone #{progress} --recursive #{uri} -b #{checkout} #{d} 2>&1", name, :install, proc {
                 FileUtils.rm_rf dir
               }
             end
diff --git a/test/workflow.vader b/test/workflow.vader
index 5ce6f92..d8ad34b 100644
--- a/test/workflow.vader
+++ b/test/workflow.vader
@@ -270,11 +270,9 @@ Execute (PlugDiff - 'No updates.'):
   AssertEqual 'No updates.', getline(1)
   q
 
-Execute (New commits on remote, PlugUpdate, then PlugDiff):
+Execute (Rollback recent updates, PlugUpdate, then PlugDiff):
   for repo in ['seoul256.vim', 'vim-emoji']
-    for _ in range(2)
-      call system(printf('cd /tmp/junegunn/%s && git commit --allow-empty -m "update"', repo))
-    endfor
+    call system(printf('cd %s/%s && git reset HEAD^^ --hard', g:plug_home, repo))
   endfor
   PlugUpdate
 
@@ -641,8 +639,8 @@ Execute (On update):
   Plug 'junegunn/vim-pseudocl', { 'do': 'touch updated' }
   call plug#end()
 
-  " New commits on remote
-  call system('cd /tmp/junegunn/vim-pseudocl && git commit --allow-empty -m "update"')
+  " Reset for updates
+  call system('cd '.g:plugs['vim-pseudocl'].dir.' && git reset --hard HEAD^')
 
   silent PlugUpdate
   Log getline(1, '$')
@@ -705,7 +703,6 @@ Execute (Using Funcref):
   Plug 'junegunn/vim-pseudocl',   { 'do': function('PlugUpdated') }
   call plug#end()
 
-  call system('cd /tmp/junegunn/vim-easy-align && git commit --allow-empty -m "update"')
   call system('cd '.g:plugs['vim-easy-align'].dir.' && git reset --hard HEAD^')
   call system('rm -rf '.g:plugs['vim-pseudocl'].dir)