"volt get -u" shows upgraded message with same hashes #191
Description
Currently volt shows the following message when remote URL is changed but identical
e.g.: https://github.com/tyru/dummy -> git@github.com:tyru/dummy.git
$ volt get -u tyru/dummy
[INFO] Full building /home/tyru/.vim/pack/volt/opt directory ...
[INFO] Installing vimrc and gvimrc ...
* github.com/tyru/dummy > upgraded (d77676e3e9fd229eb80535a46bc244121dcf50da..d77676e3e9fd229eb80535a46bc244121dcf50da)
The above two hashes are same, so the worktree is not updated.