$ git clone -n https://src.fedoraproject.org/rpms/firmitas.git /var/lib/mock/f41-build-side-2-python-2704201-30406/root/chroot_tmpdir/scmroot/firmitas
Cloning into '/var/lib/mock/f41-build-side-2-python-2704201-30406/root/chroot_tmpdir/scmroot/firmitas'...
$ git fetch origin c61f2c6e5684433b6f8d854692dd249bdaa190ff:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/firmitas
 * [new ref]         c61f2c6e5684433b6f8d854692dd249bdaa190ff -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c61f2c6 Add tarball associated with v0.1.4