$ git clone -n https://src.fedoraproject.org/rpms/golang-github-eclesh-welford.git /var/lib/mock/f39-build-2231885-53311/root/chroot_tmpdir/scmroot/golang-github-eclesh-welford
Cloning into '/var/lib/mock/f39-build-2231885-53311/root/chroot_tmpdir/scmroot/golang-github-eclesh-welford'...
$ git fetch origin 2430f9b40e44020df775fc01ea3d8e7142efebca:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-eclesh-welford
 * [new ref]         2430f9b40e44020df775fc01ea3d8e7142efebca -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2430f9b Increase another tolerance, needed on s390x build