$ git clone -n https://src.fedoraproject.org/rpms/cantera.git /var/lib/mock/f41-build-830632-156685/root/chroot_tmpdir/scmroot/cantera
Cloning into '/var/lib/mock/f41-build-830632-156685/root/chroot_tmpdir/scmroot/cantera'...
$ git fetch origin 84af5633f6d9cc2ccd4313cf5acaf9a3daa99691:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cantera
 * [new ref]         84af5633f6d9cc2ccd4313cf5acaf9a3daa99691 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 84af563 backport patch for fmt 11