$ git clone -n https://src.fedoraproject.org/rpms/flam3.git /var/lib/mock/f40-build-2207915-52101/root/chroot_tmpdir/scmroot/flam3
Cloning into '/var/lib/mock/f40-build-2207915-52101/root/chroot_tmpdir/scmroot/flam3'...
$ git fetch origin d1e7b9db97bdde400d7f97c255022d3bd7c45f55:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/flam3
 * [new ref]         d1e7b9db97bdde400d7f97c255022d3bd7c45f55 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d1e7b9d Add Packit config