$ git clone -n https://src.fedoraproject.org/rpms/kf6-kunitconversion.git /var/lib/mock/f42-build-side-1-3585959-46912/root/chroot_tmpdir/scmroot/kf6-kunitconversion
Cloning into '/var/lib/mock/f42-build-side-1-3585959-46912/root/chroot_tmpdir/scmroot/kf6-kunitconversion'...
$ git fetch origin 86279acd10a72805ffff4c4f861730328e26cfd5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-kunitconversion
 * [new ref]         86279acd10a72805ffff4c4f861730328e26cfd5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 86279ac 6.16.0