$ git clone -n https://src.fedoraproject.org/rpms/perl-Data-Taxi.git /var/lib/mock/f45-build-22996-595/root/chroot_tmpdir/scmroot/perl-Data-Taxi
Cloning into '/var/lib/mock/f45-build-22996-595/root/chroot_tmpdir/scmroot/perl-Data-Taxi'...
$ git fetch origin 6eba05bad3fbb2932f86e1227b440ba6e0570e51:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Data-Taxi
 * [new ref]         6eba05bad3fbb2932f86e1227b440ba6e0570e51 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6eba05b Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild