$ git clone -n https://src.fedoraproject.org/rpms/python-metakernel.git /var/lib/mock/f40-build-2256389-54278/root/chroot_tmpdir/scmroot/python-metakernel
Cloning into '/var/lib/mock/f40-build-2256389-54278/root/chroot_tmpdir/scmroot/python-metakernel'...
$ git fetch origin 3e30616c683db708dff6e40346512239d6ab8574:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-metakernel
 * [new ref]         3e30616c683db708dff6e40346512239d6ab8574 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3e30616 Update to version 0.30.1