$ git clone -n https://src.fedoraproject.org/rpms/libnbd.git /var/lib/mock/f40-build-762795-122257/root/chroot_tmpdir/scmroot/libnbd
Cloning into '/var/lib/mock/f40-build-762795-122257/root/chroot_tmpdir/scmroot/libnbd'...
$ git reset --hard a23f99a011cb005eb49e11bbbf958d7291fa536d
HEAD is now at a23f99a Fixes for https://github.com/ocaml/ocaml/issues/12820