utils.rb in xot-0.1.34

- old
+ new

@@ -18,11 +18,12 @@
     .reject {|ext| ext == name}
   exts = exts & [only].flatten.map(&:to_s) if only
 
   exts.each do |ext|
     gem   = RENAMES[ext.to_sym].then {|s| s || ext}
-    clone = "git clone --depth 1 https://github.com/xord/#{ext}.git ../#{ext}"
     ver   = gemspec[/add_runtime_dependency.*['"]#{gem}['"].*['"]\s*~>\s*([\d\.]+)\s*['"]/, 1]
+    opts  = '-c advice.detachedHead=false --depth 1'
+    clone = "git clone #{opts} https://github.com/xord/#{ext}.git ../#{ext}"
 
     # 'rake subtree:push' pushes all subrepos, so cloning by new tag
     # often fails before tagging each new tag
     sh %( #{clone} --branch v#{ver} || #{clone} )
     sh %( cd ../#{ext} && rake ext )