$ git clone -n https://src.fedoraproject.org/rpms/jello.git /var/lib/mock/f40-build-2241335-53661/root/chroot_tmpdir/scmroot/jello
Cloning into '/var/lib/mock/f40-build-2241335-53661/root/chroot_tmpdir/scmroot/jello'...
$ git fetch origin 84b3a1164787006b2da5d061fbf625178f430e39:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jello
 * [new ref]         84b3a1164787006b2da5d061fbf625178f430e39 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 84b3a11 Replace deprecated license_file with license_files in setup.cfg