$ git clone -n https://src.fedoraproject.org/rpms/jmol.git /var/lib/mock/f39-build-2080430-49706/root/chroot_tmpdir/scmroot/jmol
Cloning into '/var/lib/mock/f39-build-2080430-49706/root/chroot_tmpdir/scmroot/jmol'...
$ git fetch origin dd3e304cdb3fada3717dad5903d8ee481675ced2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jmol
 * [new ref]         dd3e304cdb3fada3717dad5903d8ee481675ced2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dd3e304 Version 16.1.45