/**
 * Git parses any argument beginning with `-` as an option rather than a
 * revision, so a flag-shaped revision could smuggle options such as
 * `--upload-pack` into the git commands Nx runs.
 */
export declare function assertValidGitRevision(revision: string): void;
/**
 * For refs Nx itself recorded from `git rev-parse` and later read back off
 * disk, where anything other than a commit sha means the value was tampered
 * with rather than that the user picked an unusual revision.
 */
export declare function assertValidGitSha(sha: string): void;