Add `--ref-format` option to scalar clone (port to `vfs-2.52.0`)#832

mjcheetham wants to merge 2 commits intomicrosoft:vfs-2.52.0microsoft/git:vfs-2.52.0from

mjcheetham:scalar-reftable-2.52mjcheetham/git:scalar-reftable-2.52Copy head branch name to clipboard