$ git clone -n https://src.fedoraproject.org/rpms/cantera.git /var/lib/mock/f41-build-815121-149418/root/chroot_tmpdir/scmroot/cantera
Cloning into '/var/lib/mock/f41-build-815121-149418/root/chroot_tmpdir/scmroot/cantera'...
$ git fetch origin 26eb051a303ed664f8763883343f33a1ca92b8b6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cantera
 * [new ref]         26eb051a303ed664f8763883343f33a1ca92b8b6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 26eb051 add python3-pint recommends for Cantera with units