Running theme install failed - fatal remote error: "The unauthenticated git protocol on port 9418 is no longer supported"

Describe the bug

Running: "bundle exec rake themes:install"

We get error:

Installing theme imamopravoznati-theme from git://github.com/codeforcroatia/imamopravoznati-theme.git
Running uninstall hook in /data/www/imamopravoznati.org/alaveteli/lib/themes/imamopravoznati-theme
fatal: remote error: 
  The unauthenticated git protocol on port 9418 is no longer supported.
Please see https://github.blog/2021-09-01-improving-git-protocol-security-github/ for more information.
rake aborted!

To Reproduce Steps to reproduce the behavior:

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See error

Expected behavior

Screenshots

Desktop (please complete the following information):

OS: [e.g. Windows]
Browser [e.g. chrome, safari]
Version [e.g. 22]

Smartphone (please complete the following information):

Device: [e.g. iPhone6]
OS: [e.g. iOS8.1]
Browser [e.g. stock browser, safari]
Version [e.g. 22]

Additional context

codeforcroatia / imamopravoznati-theme

Running theme install failed - fatal remote error: "The unauthenticated git protocol on port 9418 is no longer supported" #134