$ git clone -n https://src.fedoraproject.org/rpms/rust-silver.git /var/lib/mock/f31-build-91406-32308/root/chroot_tmpdir/scmroot/rust-silver
Cloning into '/var/lib/mock/f31-build-91406-32308/root/chroot_tmpdir/scmroot/rust-silver'...
$ git reset --hard d7d9db12a7c4a0ddf65afcd86e2bcad3088242b5
HEAD is now at d7d9db1 Regenerate