$ git clone -n https://src.fedoraproject.org/rpms/perl-CGI-Application.git /var/lib/mock/f45-build-21941-588/root/chroot_tmpdir/scmroot/perl-CGI-Application
Cloning into '/var/lib/mock/f45-build-21941-588/root/chroot_tmpdir/scmroot/perl-CGI-Application'...
$ git fetch origin 85b3207e6d16cb1d5e641eed90bab7e5fbc02b19:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-CGI-Application
 * [new ref]         85b3207e6d16cb1d5e641eed90bab7e5fbc02b19 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 85b3207 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild