$ git clone -n https://src.fedoraproject.org/rpms/smb4k.git /var/lib/mock/f42-build-3406835-45143/root/chroot_tmpdir/scmroot/smb4k
Cloning into '/var/lib/mock/f42-build-3406835-45143/root/chroot_tmpdir/scmroot/smb4k'...
$ git fetch origin ec2acdf3148e2d891c0ab12c6ad99efaf3011540:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/smb4k
 * [new ref]         ec2acdf3148e2d891c0ab12c6ad99efaf3011540 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ec2acdf New release 4.0.0