$ scalar clone https://office.visualstudio.com/DefaultCollection/<...>
Skipping GVFS protocol check...
Fetching objects from remote...
Failed
Cannot clone @ /Users/sameer/enlist/<...>
Error: Failed to complete regular clone: fatal: helper error (255): Interactivity is required but has been disabled.
fatal: could not read Username for 'https://office.visualstudio.com': terminal prompts disabled
Had to manually run a git clone to complete the auth, and then ran scalar clone again to make it work
OS: Mac Big Sur
$ git version
git version 2.28.0
$ scalar version
scalar 20.10.178.6
Both git and scalar are installed using homebrew