$ git clone -n https://src.fedoraproject.org/rpms/kwin-x11.git /var/lib/mock/f42-build-side-1-3505963-45995/root/chroot_tmpdir/scmroot/kwin-x11
Cloning into '/var/lib/mock/f42-build-side-1-3505963-45995/root/chroot_tmpdir/scmroot/kwin-x11'...
$ git fetch origin ab28c29cbdbc3b3b982ec2149a24816f70df2179:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kwin-x11
 * [new ref]         ab28c29cbdbc3b3b982ec2149a24816f70df2179 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ab28c29 Rebuild (qt6)