Step "Run actions/checkout@master" started to fail

[erikw]

Hello!

I've used this action successfully for a while. Last time I used it was 2020-04-13. Today I pushed another commit to the master branch but discovered that this action now failed. No changes has been made to the repository or the Github settings for it in this time period.

It fails on the step "Run actions/checkout@master":

Fetching the repository
  /usr/bin/git -c protocol.version=2 fetch --no-tags --prune --progress --no-recurse-submodules --depth=1 origin +7eb330784af3dfa9a43fe441df0a2d9c023***452:refs/remotes/origin/master
  remote: Repository not found.
  ##[error]fatal: repository 'https://github.com/***/***.me/' not found
  The process '/usr/bin/git' failed with exit code 128

When I look at this part of the step from 13th of April, it looks like:

Fetching the repository
  /usr/bin/git -c protocol.version=2 fetch --no-tags --prune --progress --no-recurse-submodules --depth=1 origin +b89cd8a4f3f670120874fa7d4ea5854c154b791b:refs/remotes/origin/master
  remote: Enumerating objects: 26, done.        
  remote: Counting objects:   3% (1/26)
[...]        
...

Any ideas what can have happended here for this Action to break?
If there's any way I can provide more information I'd be happy to!

[erikw]

Uh, I just realized that the problem is in the checkout Action...
and there's already an issue @ actions/checkout#254