Fix checkout

Author: cdupuis

lib/events.ts

@@ -63,11 +63,12 @@ const LoadProjectStep: NpmStep = {
 	name: "load",
 	run: async (ctx, params) => {
 		const repo = eventRepo(ctx.data);
-
+		const commit = eventCommit(ctx.data);
 		const project: project.Project = await ctx.project.clone(
 			repository.gitHub({
 				owner: repo.owner,
 				repo: repo.name,
+				sha: commit.sha,
 				credential: await ctx.credential.resolve(
 					secret.gitHubAppTokenFromRepository(ctx.data.commit),
 				),