$ git clone -n https://src.fedoraproject.org/rpms/kf6.git /var/lib/mock/f45-build-14983-466/root/chroot_tmpdir/scmroot/kf6
Cloning into '/var/lib/mock/f45-build-14983-466/root/chroot_tmpdir/scmroot/kf6'...
$ git fetch origin b786cb694541006b53195fb40b58353300f380f2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6
 * [new ref]         b786cb694541006b53195fb40b58353300f380f2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b786cb6 6.31.0