$ git clone -n https://src.fedoraproject.org/rpms/geos.git /var/lib/mock/f40-build-2226561-52941/root/chroot_tmpdir/scmroot/geos
Cloning into '/var/lib/mock/f40-build-2226561-52941/root/chroot_tmpdir/scmroot/geos'...
$ git fetch origin 0d621cd9eac969e1354dcc1ac37a616cbc5c5571:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/geos
 * [new ref]         0d621cd9eac969e1354dcc1ac37a616cbc5c5571 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0d621cd Fix files