$ git clone -n https://src.fedoraproject.org/rpms/kf6-kplotting.git /var/lib/mock/f42-build-side-1-3534255-46548/root/chroot_tmpdir/scmroot/kf6-kplotting
Cloning into '/var/lib/mock/f42-build-side-1-3534255-46548/root/chroot_tmpdir/scmroot/kf6-kplotting'...
$ git fetch origin d06e90ea341c7900297edac2d2a046745fecd60a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-kplotting
 * [new ref]         d06e90ea341c7900297edac2d2a046745fecd60a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d06e90e 6.14.0