WP_Filesystem_SSH2::move( string $source, string $destination, bool $overwrite = false )

Source

File: wp-admin/includes/class-wp-filesystem-ssh2.php

public function move( $source, $destination, $overwrite = false ) {
		if ( $this->exists( $destination ) ) {
			if ( $overwrite ) {
				// We need to remove the destination file before we can rename the source.
				$this->delete( $destination, false, 'f' );
			} else {
				// If we're not overwriting, the rename will fail, so return early.
				return false;
			}
		}

		return ssh2_sftp_rename( $this->sftp_link, $source, $destination );
	}