public async Task <IEnumerable <GitlabCommit> > GetCommitsOfProject(string projectId, string branchName,
DateTimeOffset since)
{
//формат даты: YYYY-MM-DDTHH:MM:SSZ, например 2020-07-22T17:40:00Z
var url = $"https://{_domainName}/api/v4/projects/{projectId}/repository/commits" +
$"?since={since:s}Z" +
$"&ref_name={branchName}";
var request = new HttpRequestMessage(HttpMethod.Get, url);
request.Headers.Add("PRIVATE-TOKEN", _personalAccessToken);
using var response = await _client.SendAsync(request);
var json = await response.Content.ReadAsStringAsync();
return(_jsonConverter.ConvertJsonToCommits(json));
}