$ git clone -n https://src.fedoraproject.org/rpms/perl-Gtk2-Ex-FormFactory.git /var/lib/mock/f39-build-1649183-40460/root/chroot_tmpdir/scmroot/perl-Gtk2-Ex-FormFactory
Cloning into '/var/lib/mock/f39-build-1649183-40460/root/chroot_tmpdir/scmroot/perl-Gtk2-Ex-FormFactory'...
$ git fetch origin 8a2e243680e015082dcca668866755530453daac:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Gtk2-Ex-FormFactory
 * [new ref]         8a2e243680e015082dcca668866755530453daac -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8a2e243 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild