$ git clone -n https://src.fedoraproject.org/rpms/golang-github-facebook-time.git /var/lib/mock/f39-build-2232558-53337/root/chroot_tmpdir/scmroot/golang-github-facebook-time
Cloning into '/var/lib/mock/f39-build-2232558-53337/root/chroot_tmpdir/scmroot/golang-github-facebook-time'...
$ git fetch origin 13f4d6c5724451c8d5932fcf7a595b53f8129601:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-facebook-time
 * [new ref]         13f4d6c5724451c8d5932fcf7a595b53f8129601 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 13f4d6c Allow setting custom API timeouts (PR#318)