$ git clone -n https://src.fedoraproject.org/rpms/golang-github-bep-simplecobra.git /var/lib/mock/f40-build-2218283-52598/root/chroot_tmpdir/scmroot/golang-github-bep-simplecobra
Cloning into '/var/lib/mock/f40-build-2218283-52598/root/chroot_tmpdir/scmroot/golang-github-bep-simplecobra'...
$ git fetch origin ed7012894385e1744759c77e8b82f360aff50305:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-bep-simplecobra
 * [new ref]         ed7012894385e1744759c77e8b82f360aff50305 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ed70128 Update to 0.4.0