The main issue appear to be a bad interaction between git-client-plugin and gcmw (Git Credential Manager For Windows):
Gcmw works by using in the config "credential.helper=manager". This means than git will normally get the user and password Gcmw will provide.
But with "core.askpass=true" stuff will not work as expected.The build will fail. Example:
> git.exe --version # timeout=10
> git.exe -c core.askpass=true fetch --tags --progress http://*************.git +refs/heads/:refs/remotes/origin/
ERROR: Timeout after 10 minutes
ERROR: Error fetching remote repo 'origin'
What we need is something to deactivate core.askpass=true I think.
Note: Even if there is or there isn't in the Repository Credentials a user defines the result is the same.
Note: Gcmw is https://github.com/Microsoft/Git-Credential-Manager-for-Windows