trim ref when making API call to gitlab

Author: bradrydzewski

CHANGELOG.md

@@ -4,6 +4,10 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## Unreleased
+### Fixed
+- Fix issue getting a GitLab commit by ref, from [@bradrydzewski](https://github.com/bradrydzewski).
+
 ## [1.5.0]
 ### Added
 

scm/driver/gitlab/git.go

@@ -24,7 +24,7 @@ func (s *gitService) FindBranch(ctx context.Context, repo, name string) (*scm.Re
 }
 
 func (s *gitService) FindCommit(ctx context.Context, repo, ref string) (*scm.Commit, *scm.Response, error) {
-	path := fmt.Sprintf("api/v4/projects/%s/repository/commits/%s", encode(repo), ref)
+	path := fmt.Sprintf("api/v4/projects/%s/repository/commits/%s", encode(repo), scm.TrimRef(ref))
 	out := new(commit)
 	res, err := s.client.do(ctx, "GET", path, nil, out)
 	return convertCommit(out), res, err