$ git clone -n https://src.fedoraproject.org/rpms/kf6-kcodecs.git /var/lib/mock/f41-build-860829-169221/root/chroot_tmpdir/scmroot/kf6-kcodecs
Cloning into '/var/lib/mock/f41-build-860829-169221/root/chroot_tmpdir/scmroot/kf6-kcodecs'...
$ git fetch origin dc65c5fb1938c6cef6da605c369cdb90e824aaa2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-kcodecs
 * [new ref]         dc65c5fb1938c6cef6da605c369cdb90e824aaa2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dc65c5f 6.8.0