Possible regression in git 2.26.0

Today I'd noticed a failure in some custom automation that seems to came as a side effect after of a git client update.

The issue issue I'd spotted is the following:

$ git clone git://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/bionic linux/bionic Cloning into 'linux/bionic'... fatal: remote error: Parameters must have values

Reverting to git 2.17.1 didn't show the issue.

I'd asked at #git in freenode and @rafasc was able to reproduce and bisect, pointing to

https://github.com/git/git/commit/684ceae32dae726c6a5c693b257b156926aba8b7

For the time being I'd added `-c protocol.version=0` as a temporary workaround.

Is this a regression?

Thanks for looking into this.

Josep Torra