If all of a sudden you are unable to clone or push repos and you recently downloaded the latest version of msysgit (AKA Git for Windows) you are not alone.
As discussed here and confirmed here, this appears to be a bug in the 1.85.2 build, which consequently is the latest available build linking from github, which likely means that thousands of developers since the release of 1.85.2 are impacted.
3 options, from simplest on down:
1. Uninstall 1.85.2 and downgrade to a previous version.
2. Switch over to SSH instead.
3. Apply the patch “discussed” here.
Personally, I chose 2 out of sheer laziness and opted out of 3 due to a general lack of motivation resulting from what appears to be more interest in pedantic redirection and passive aggressive replies from project representation than communication and spirit of collaboration (which is supposed to be what OSS is all about).
Hopefully this will be fixed in a new build soon. Hope this helps.