$ git clone -n https://src.fedoraproject.org/rpms/perl-CGI-Application-Plugin-JSON.git /var/lib/mock/f45-build-21971-589/root/chroot_tmpdir/scmroot/perl-CGI-Application-Plugin-JSON
Cloning into '/var/lib/mock/f45-build-21971-589/root/chroot_tmpdir/scmroot/perl-CGI-Application-Plugin-JSON'...
$ git fetch origin 184e9674cfebec8245215a03199de919d59cbd87:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-CGI-Application-Plugin-JSON
 * [new ref]         184e9674cfebec8245215a03199de919d59cbd87 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 184e967 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild