$ git clone -n https://src.fedoraproject.org/rpms/python-immutabledict.git /var/lib/mock/f40-build-2213758-52348/root/chroot_tmpdir/scmroot/python-immutabledict
Cloning into '/var/lib/mock/f40-build-2213758-52348/root/chroot_tmpdir/scmroot/python-immutabledict'...
$ git fetch origin e1b8108f90cb9baa733a6210c450f1a4e3481840:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-immutabledict
 * [new ref]         e1b8108f90cb9baa733a6210c450f1a4e3481840 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e1b8108 Update to v4.0.0