$ git clone -n https://src.fedoraproject.org/rpms/R-simmer.git /var/lib/mock/f45-build-6423-348/root/chroot_tmpdir/scmroot/R-simmer
Cloning into '/var/lib/mock/f45-build-6423-348/root/chroot_tmpdir/scmroot/R-simmer'...
$ git fetch origin 50acc3efd39160c4800f2bf8b156962f51ff588b:KOJI_FETCH_HEAD
fatal: unable to access 'https://src.fedoraproject.org/rpms/R-simmer.git/': Failed to connect to src.fedoraproject.org port 443 after 4007 ms: Could not connect to server
$ git reset --hard 50acc3efd39160c4800f2bf8b156962f51ff588b
HEAD is now at 50acc3e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild