$ git clone -n https://src.fedoraproject.org/rpms/thermald.git /var/lib/mock/f40-build-804334-144502/root/chroot_tmpdir/scmroot/thermald
Cloning into '/var/lib/mock/f40-build-804334-144502/root/chroot_tmpdir/scmroot/thermald'...
$ git fetch origin 150b421cd82c621c651bfedf894f1f5943f8914c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/thermald
 * [new ref]         150b421cd82c621c651bfedf894f1f5943f8914c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 150b421 Update to 2.5.6, spec cleanups