func (s *RepositoriesService) GetCommit(ctx context.Context, owner, repo, sha string, opts *ListOptions) (*RepositoryCommit, *Response, error) {
	u := fmt.Sprintf("repos/%v/%v/commits/%v", owner, repo, sha)
	u, err := addOptions(u, opts)
	if err != nil {
		return nil, nil, err
	}
	req, err := s.client.NewRequest("GET", u, nil)
	if err != nil {
		return nil, nil, err
	}
	commit := new(RepositoryCommit)
	resp, err := s.client.Do(ctx, req, commit)
	if err != nil {
		return nil, resp, err
	}
	return commit, resp, nil
}
GetCommit fetches the specified commit, including all details about it.

GitHub API docs: https://docs.github.com/en/free-pro-team@latest/rest/reference/repos/#get-a-single-commit
GitHub API docs: https://docs.github.com/en/free-pro-team@latest/rest/reference/repos/#get-a-commit
package github
import (
	"bytes"
	"context"
	"fmt"
	"net/url"
	"time"
)
type RepositoryCommit struct {
	NodeID      *string   `json:"node_id,omitempty"`
	SHA         *string   `json:"sha,omitempty"`
	Commit      *Commit   `json:"commit,omitempty"`
	Author      *User     `json:"author,omitempty"`
	Committer   *User     `json:"committer,omitempty"`
	Parents     []*Commit `json:"parents,omitempty"`
	HTMLURL     *string   `json:"html_url,omitempty"`
	URL         *string   `json:"url,omitempty"`
	CommentsURL *string   `json:"comments_url,omitempty"`
	Stats *CommitStats `json:"stats,omitempty"`
	Files []*CommitFile `json:"files,omitempty"`
}
func (r RepositoryCommit) String() string {
	return Stringify(r)
}
type CommitStats struct {
	Additions *int `json:"additions,omitempty"`
	Deletions *int `json:"deletions,omitempty"`
	Total     *int `json:"total,omitempty"`
}
func (c CommitStats) String() string {
	return Stringify(c)
}
type CommitFile struct {
	SHA              *string `json:"sha,omitempty"`
	Filename         *string `json:"filename,omitempty"`
	Additions        *int    `json:"additions,omitempty"`
	Deletions        *int    `json:"deletions,omitempty"`
	Changes          *int    `json:"changes,omitempty"`
	Status           *string `json:"status,omitempty"`
	Patch            *string `json:"patch,omitempty"`
	BlobURL          *string `json:"blob_url,omitempty"`
	RawURL           *string `json:"raw_url,omitempty"`
	ContentsURL      *string `json:"contents_url,omitempty"`
	PreviousFilename *string `json:"previous_filename,omitempty"`
}
func (c CommitFile) String() string {
	return Stringify(c)
}
type CommitsComparison struct {
	BaseCommit      *RepositoryCommit `json:"base_commit,omitempty"`
	MergeBaseCommit *RepositoryCommit `json:"merge_base_commit,omitempty"`
	Status       *string `json:"status,omitempty"`
	AheadBy      *int    `json:"ahead_by,omitempty"`
	BehindBy     *int    `json:"behind_by,omitempty"`
	TotalCommits *int    `json:"total_commits,omitempty"`
	Commits []*RepositoryCommit `json:"commits,omitempty"`
	Files []*CommitFile `json:"files,omitempty"`
	HTMLURL      *string `json:"html_url,omitempty"`
	PermalinkURL *string `json:"permalink_url,omitempty"`
	DiffURL      *string `json:"diff_url,omitempty"`
	PatchURL     *string `json:"patch_url,omitempty"`
	URL          *string `json:"url,omitempty"`  
}
func (c CommitsComparison) String() string {
	return Stringify(c)
}
type CommitsListOptions struct {
	SHA string `url:"sha,omitempty"`
	Path string `url:"path,omitempty"`
	Author string `url:"author,omitempty"`
	Since time.Time `url:"since,omitempty"`
	Until time.Time `url:"until,omitempty"`
	ListOptions
}
type BranchCommit struct {
	Name      *string `json:"name,omitempty"`
	Commit    *Commit `json:"commit,omitempty"`
	Protected *bool   `json:"protected,omitempty"`
}
func (s *RepositoriesService) ListCommits(ctx context.Context, owner, repo string, opts *CommitsListOptions) ([]*RepositoryCommit, *Response, error) {
	u := fmt.Sprintf("repos/%v/%v/commits", owner, repo)
	u, err := addOptions(u, opts)
	if err != nil {
		return nil, nil, err
	}
	req, err := s.client.NewRequest("GET", u, nil)
	if err != nil {
		return nil, nil, err
	}
	var commits []*RepositoryCommit
	resp, err := s.client.Do(ctx, req, &commits)
	if err != nil {
		return nil, resp, err
	}
	return commits, resp, nil
}