$ git clone -n https://src.fedoraproject.org/rpms/fedora-dockerfiles.git /var/lib/mock/f40-build-2347765-60128/root/chroot_tmpdir/scmroot/fedora-dockerfiles
Cloning into '/var/lib/mock/f40-build-2347765-60128/root/chroot_tmpdir/scmroot/fedora-dockerfiles'...
fatal: unable to create thread: Resource temporarily unavailable
fatal: fetch-pack: invalid index-pack output