Authorization: Basic

.../...
10:38:29.088068 http.c:699              == Info: Re-using existing connection with host github.com
10:38:29.088080 http.c:699              == Info: Server auth using Basic with user '12345566'
10:38:29.088124 http.c:699              == Info: [HTTP/2] [7] OPENED stream for https://github.com/your-organization/your-repo.git/git-upload-pack
10:38:29.088133 http.c:699              == Info: [HTTP/2] [7] [:method: POST]
10:38:29.088136 http.c:699              == Info: [HTTP/2] [7] [:scheme: https]
10:38:29.088140 http.c:699              == Info: [HTTP/2] [7] [:authority: github.com]
10:38:29.088143 http.c:699              == Info: [HTTP/2] [7] [:path: /your-organization/your-repo.git/git-upload-pack]
10:38:29.088146 http.c:699              == Info: [HTTP/2] [7] [ authorization: Basic XXXXXXXXXXXXXXXXXX]
.../...

git clone, git clone -vv, git clone --depth, git clone -c http.sslVerify=false