Open arbitrary file in specific branch

[mogelbrod]

Hi!
Similarly to the issue Quickly show current file on other branch #646 I'm used to work in vim using the fugitive plugin to, amongst other things, easily open up a specific file in a specific branch using :Gedit {branchName}:{filePath}. The closest I've come with Gitlens is to use the gitlens.openFileRevisionFrom/gitlens.openRevisionFile commands, but they seem to only work with the active file and therefore appear unusable when one wants to open a file that doesn't currently exist in the working directory.

Ideally there would be a command that first lets the user pick a branch/ref and then show a quickpick window with all files in the repository for that given ref. Upon selection it would then open the corresponding version of that file.

Thanks in advance!