$ git clone -n https://src.fedoraproject.org/rpms/golang-github-streadway-handy.git /var/lib/mock/f41-build-1318704-23516/root/chroot_tmpdir/scmroot/golang-github-streadway-handy
Cloning into '/var/lib/mock/f41-build-1318704-23516/root/chroot_tmpdir/scmroot/golang-github-streadway-handy'...
$ git fetch origin 6464cc889e7dcec381e6ad5d7a419f1fb2c3e73e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-streadway-handy
 * [new ref]         6464cc889e7dcec381e6ad5d7a419f1fb2c3e73e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6464cc8 Fix FTBFS