$ git clone -n https://src.fedoraproject.org/rpms/golang-gopkg-alecthomas-kingpin-2.git /var/lib/mock/f40-build-2218779-52622/root/chroot_tmpdir/scmroot/golang-gopkg-alecthomas-kingpin-2
Cloning into '/var/lib/mock/f40-build-2218779-52622/root/chroot_tmpdir/scmroot/golang-gopkg-alecthomas-kingpin-2'...
$ git fetch origin 09bb76c8e536a35d54b224c03c6571122f00333e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-gopkg-alecthomas-kingpin-2
 * [new ref]         09bb76c8e536a35d54b224c03c6571122f00333e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 09bb76c Move github.com/alecthomas/kingpin/v2 to a package