Merge pull request #1990 from gitgitgadget/fix-git-exec-path

CIHelper: do set the `GIT_EXEC_PATH` correctly

Author: webstech

lib/ci-helper.ts

@@ -86,7 +86,7 @@ export class CIHelper {
             // see https://github.com/desktop/dugite/blob/v2.7.1/lib/git-environment.ts#L44-L64
             // Also: We cannot use `await git(["--exec-path"]);` because that would use Dugite, which would
             // override `GIT_EXEC_PATH` and then `git --exec-path` would report _that_...
-            process.env.GIT_EXEC_PATH = spawnSync("/usr/bin/git", ["--exec-path"]).stdout.toString("utf-8").trimEnd();
+            process.env.GIT_EXEC_PATH = spawnSync(gitPath, ["--exec-path"]).stdout.toString("utf-8").trimEnd();
             break;
         }