$ git clone -n https://src.fedoraproject.org/rpms/golang-x-net.git /var/lib/mock/f40-build-2246398-53810/root/chroot_tmpdir/scmroot/golang-x-net
Cloning into '/var/lib/mock/f40-build-2246398-53810/root/chroot_tmpdir/scmroot/golang-x-net'...
$ git fetch origin 030f2624b4ec9cd68c3ab60815b3206b65746f8a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-x-net
 * [new ref]         030f2624b4ec9cd68c3ab60815b3206b65746f8a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 030f262 update to v0.20.0, close rhbz#2257356