Could not checkout ref '...': fatal: invalid reference

[andry81]

trafficstars

Sometimes could not checkout ref error happens.

Steps to reproduce:

1. Create a repo with 1_2_3_20201010 branch (ex: https://github.com/andry81-tests/vcstool-test-A)
2. Switch to master branch:

   git switch --orphan master
   

3. Create .externals:

   repositories:
   
     _externals/1_2_3_20201010:
       type:             git
       url:              https://github.com/andry81-tests/vcstool-test-A
       version:          1_2_3_20201010
   

4. Import .externals:

   vcs import < .externals
   

   === ._externals/1_2_3_20201010 (git) === Could not checkout ref '12320201010': fatal: invalid reference: 12320201010

>git --version
git version 2.24.0.windows.2

[andry81]

Seems bug in the yaml parser, because this works:

repositories:

  _externals/1_2_3_20201010:
    type:             git
    url:              https://github.com/andry81-tests/vcstool-test-A
    version:          '1_2_3_20201010'