$ git clone -n https://src.fedoraproject.org/rpms/perl-Gtk2-Ex-FormFactory.git /var/lib/mock/f45-build-23837-599/root/chroot_tmpdir/scmroot/perl-Gtk2-Ex-FormFactory
Cloning into '/var/lib/mock/f45-build-23837-599/root/chroot_tmpdir/scmroot/perl-Gtk2-Ex-FormFactory'...
$ git fetch origin 7c3d4cca95fe10b5bbb4ee6fb503823724969c18:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Gtk2-Ex-FormFactory
 * [new ref]         7c3d4cca95fe10b5bbb4ee6fb503823724969c18 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7c3d4cc Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild