$ git clone -n https://src.fedoraproject.org/rpms/ovn.git /var/lib/mock/f40-build-1537113-23930/root/chroot_tmpdir/scmroot/ovn
Cloning into '/var/lib/mock/f40-build-1537113-23930/root/chroot_tmpdir/scmroot/ovn'...
$ git fetch origin 9b6558424e0441416ead5ec7534af88b924cfca1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ovn
 * [new ref]         9b6558424e0441416ead5ec7534af88b924cfca1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9b65584 Update the version which was missed in the previous commit.