$ git clone -n https://src.fedoraproject.org/rpms/golang-github-zaf-g711.git /var/lib/mock/f39-build-1512899-35579/root/chroot_tmpdir/scmroot/golang-github-zaf-g711
Cloning into '/var/lib/mock/f39-build-1512899-35579/root/chroot_tmpdir/scmroot/golang-github-zaf-g711'...
$ git fetch origin c8f240f3090b8849b6c04f8d6341a01dfad626fe:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-zaf-g711
 * [new ref]         c8f240f3090b8849b6c04f8d6341a01dfad626fe -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c8f240f Initial import (RHBZ#2132276)