$ git clone -n https://src.fedoraproject.org/rpms/kf6-sonnet.git /var/lib/mock/f41-build-860893-169221/root/chroot_tmpdir/scmroot/kf6-sonnet
Cloning into '/var/lib/mock/f41-build-860893-169221/root/chroot_tmpdir/scmroot/kf6-sonnet'...
$ git fetch origin 8188e26a61348349136ca5afb62339ec668c2939:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-sonnet
 * [new ref]         8188e26a61348349136ca5afb62339ec668c2939 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8188e26 6.8.0