$ git clone -n https://src.fedoraproject.org/rpms/perl-CGI-Application-Plugin-Authentication.git /var/lib/mock/f45-build-21978-589/root/chroot_tmpdir/scmroot/perl-CGI-Application-Plugin-Authentication
Cloning into '/var/lib/mock/f45-build-21978-589/root/chroot_tmpdir/scmroot/perl-CGI-Application-Plugin-Authentication'...
$ git fetch origin 5f8e5e1d1ed421d52725717711f7b4dbf3db7f9e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-CGI-Application-Plugin-Authentication
 * [new ref]         5f8e5e1d1ed421d52725717711f7b4dbf3db7f9e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5f8e5e1 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild