$ git clone -n https://src.fedoraproject.org/rpms/kf6-kxmlgui.git /var/lib/mock/f42-build-side-1-3587679-46934/root/chroot_tmpdir/scmroot/kf6-kxmlgui
Cloning into '/var/lib/mock/f42-build-side-1-3587679-46934/root/chroot_tmpdir/scmroot/kf6-kxmlgui'...
$ git fetch origin 0890f33f93e1fdd6dd35cc09c12264e1da0c2fcb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-kxmlgui
 * [new ref]         0890f33f93e1fdd6dd35cc09c12264e1da0c2fcb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0890f33 6.16.0