$ git clone -n https://src.fedoraproject.org/rpms/perl-GeoIP2.git /var/lib/mock/f41-build-714936-13069/root/chroot_tmpdir/scmroot/perl-GeoIP2
Cloning into '/var/lib/mock/f41-build-714936-13069/root/chroot_tmpdir/scmroot/perl-GeoIP2'...
$ git fetch origin dd9a1239dce9c251c790237a47b9cf0dc346a8a9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-GeoIP2
 * [new ref]         dd9a1239dce9c251c790237a47b9cf0dc346a8a9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dd9a123 Eliminate use of obsolete %patchN syntax (#2283636)