$ git clone -n https://src.fedoraproject.org/rpms/lua-argparse.git /var/lib/mock/f39-build-1915723-42893/root/chroot_tmpdir/scmroot/lua-argparse
Cloning into '/var/lib/mock/f39-build-1915723-42893/root/chroot_tmpdir/scmroot/lua-argparse'...
$ git fetch origin 488629d0d7793b52c7d6031fee2f74905eb794d8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/lua-argparse
 * [new ref]         488629d0d7793b52c7d6031fee2f74905eb794d8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 488629d Forgot to include new source