$ git clone -n https://src.fedoraproject.org/rpms/cantera.git /var/lib/mock/f41-build-846061-162955/root/chroot_tmpdir/scmroot/cantera
Cloning into '/var/lib/mock/f41-build-846061-162955/root/chroot_tmpdir/scmroot/cantera'...
$ git fetch origin ed1c9bfd6f4ee786792444f1f49c40cd4185dc3f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cantera
 * [new ref]         ed1c9bfd6f4ee786792444f1f49c40cd4185dc3f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ed1c9bf update to v3.0.1, close rhbz#2306024