$ git clone -n https://src.fedoraproject.org/rpms/kf6-kdeclarative.git /var/lib/mock/f42-build-side-1-3585702-46907/root/chroot_tmpdir/scmroot/kf6-kdeclarative
Cloning into '/var/lib/mock/f42-build-side-1-3585702-46907/root/chroot_tmpdir/scmroot/kf6-kdeclarative'...
$ git fetch origin 0eaf13b49dcd8e804e003561e55b1f1c366fc888:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-kdeclarative
 * [new ref]         0eaf13b49dcd8e804e003561e55b1f1c366fc888 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0eaf13b 6.16.0