$ git clone -n https://src.fedoraproject.org/rpms/thermald.git /var/lib/mock/f39-build-1512427-35565/root/chroot_tmpdir/scmroot/thermald
Cloning into '/var/lib/mock/f39-build-1512427-35565/root/chroot_tmpdir/scmroot/thermald'...
$ git fetch origin 94cb9ec669fe641b2e275f0c45b5823d71e36433:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/thermald
 * [new ref]         94cb9ec669fe641b2e275f0c45b5823d71e36433 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 94cb9ec Fix build with latest systemd