$ git clone -n https://src.fedoraproject.org/rpms/golang-github-soniakeys-quant.git /var/lib/mock/f38-build-side-42-init-devel-1407303-31300/root/chroot_tmpdir/scmroot/golang-github-soniakeys-quant
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1407303-31300/root/chroot_tmpdir/scmroot/golang-github-soniakeys-quant'...
$ git fetch origin af9535611d8d2a3b4756c232968f1ea73ea05979:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-soniakeys-quant
 * [new ref]         af9535611d8d2a3b4756c232968f1ea73ea05979 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at af95356 Initial import; Fixes: RHBZ#2156196