$ git clone -n https://src.fedoraproject.org/rpms/krdp.git /var/lib/mock/f42-build-862523-170850/root/chroot_tmpdir/scmroot/krdp
Cloning into '/var/lib/mock/f42-build-862523-170850/root/chroot_tmpdir/scmroot/krdp'...
$ git fetch origin 57bfede6bb4e297339755206f7405aea5e15cccd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/krdp
 * [new ref]         57bfede6bb4e297339755206f7405aea5e15cccd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 57bfede 6.2.4