$ git clone -n https://src.fedoraproject.org/rpms/xfoil.git /var/lib/mock/f41-build-side-1-2671337-29139/root/chroot_tmpdir/scmroot/xfoil
Cloning into '/var/lib/mock/f41-build-side-1-2671337-29139/root/chroot_tmpdir/scmroot/xfoil'...
$ git fetch origin ef71e02021e2c275dc5a2e9bd55d30894b1e86a2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xfoil
 * [new ref]         ef71e02021e2c275dc5a2e9bd55d30894b1e86a2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ef71e02 convert license to SPDX