$ git clone -n https://src.fedoraproject.org/rpms/thttpd.git /var/lib/mock/f41-build-side-1-2670600-29060/root/chroot_tmpdir/scmroot/thttpd
Cloning into '/var/lib/mock/f41-build-side-1-2670600-29060/root/chroot_tmpdir/scmroot/thttpd'...
$ git fetch origin bc0a454df752f378fa678e460cfefe7d6eea1f95:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/thttpd
 * [new ref]         bc0a454df752f378fa678e460cfefe7d6eea1f95 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bc0a454 convert license to SPDX