$ git clone -n https://src.fedoraproject.org/rpms/golang-github-alecthomas-kong.git /var/lib/mock/f42-build-side-1-3498264-45962/root/chroot_tmpdir/scmroot/golang-github-alecthomas-kong
Cloning into '/var/lib/mock/f42-build-side-1-3498264-45962/root/chroot_tmpdir/scmroot/golang-github-alecthomas-kong'...
$ git fetch origin 6ae38bfcbbc0ca7c40a08b52dcdf188af3b6da4c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-alecthomas-kong
 * [new ref]         6ae38bfcbbc0ca7c40a08b52dcdf188af3b6da4c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6ae38bf Update to 1.10.0 upstream release