$ git clone -n https://src.fedoraproject.org/rpms/perl-Gtk2-Ex-Dialogs.git /var/lib/mock/f45-build-23838-599/root/chroot_tmpdir/scmroot/perl-Gtk2-Ex-Dialogs
Cloning into '/var/lib/mock/f45-build-23838-599/root/chroot_tmpdir/scmroot/perl-Gtk2-Ex-Dialogs'...
$ git fetch origin 2e5dd089399c0111375cb59c7b12f00a5dff23cc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Gtk2-Ex-Dialogs
 * [new ref]         2e5dd089399c0111375cb59c7b12f00a5dff23cc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2e5dd08 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild