$ git clone -n https://src.fedoraproject.org/rpms/kf5-frameworkintegration.git /var/lib/mock/f39-build-1659272-40621/root/chroot_tmpdir/scmroot/kf5-frameworkintegration
Cloning into '/var/lib/mock/f39-build-1659272-40621/root/chroot_tmpdir/scmroot/kf5-frameworkintegration'...
$ git fetch origin 5869e75bc6eb96634ec99c119a8d3609b54a6a64:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-frameworkintegration
 * [new ref]         5869e75bc6eb96634ec99c119a8d3609b54a6a64 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5869e75 Rebuild (qt5)