$ git clone -n https://src.fedoraproject.org/rpms/geopmd.git /var/lib/mock/f42-build-3403691-45135/root/chroot_tmpdir/scmroot/geopmd
Cloning into '/var/lib/mock/f42-build-3403691-45135/root/chroot_tmpdir/scmroot/geopmd'...
$ git fetch origin 2d23f34aa4a87cda505c164c83d39be162fdf6c1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/geopmd
 * [new ref]         2d23f34aa4a87cda505c164c83d39be162fdf6c1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2d23f34 FTBFS fix (rhbz#2340207)