$ git clone -n https://src.fedoraproject.org/rpms/perl-Gtk2-Ex-Simple-List.git /var/lib/mock/f45-build-23833-599/root/chroot_tmpdir/scmroot/perl-Gtk2-Ex-Simple-List
Cloning into '/var/lib/mock/f45-build-23833-599/root/chroot_tmpdir/scmroot/perl-Gtk2-Ex-Simple-List'...
$ git fetch origin 86ce7be6790b46eb45c68b8b3106b83e46e22fdb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Gtk2-Ex-Simple-List
 * [new ref]         86ce7be6790b46eb45c68b8b3106b83e46e22fdb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 86ce7be Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild