$ git clone -n https://src.fedoraproject.org/rpms/marble.git /var/lib/mock/f40-build-2200368-51775/root/chroot_tmpdir/scmroot/marble
Cloning into '/var/lib/mock/f40-build-2200368-51775/root/chroot_tmpdir/scmroot/marble'...
$ git fetch origin 9e47bf8a61d579f501df68e367028bb1c197a6af:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/marble
 * [new ref]         9e47bf8a61d579f501df68e367028bb1c197a6af -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9e47bf8 Rebuild (shapelib)