$ git clone -n https://src.fedoraproject.org/rpms/kwin.git /var/lib/mock/f42-build-side-1-3523439-46206/root/chroot_tmpdir/scmroot/kwin
Cloning into '/var/lib/mock/f42-build-side-1-3523439-46206/root/chroot_tmpdir/scmroot/kwin'...
$ git fetch origin bfd17b0d2d10342763967d0140318253cb2920fe:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kwin
 * [new ref]         bfd17b0d2d10342763967d0140318253cb2920fe -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bfd17b0 Rebuild (qt6)