$ git clone -n https://src.fedoraproject.org/rpms/qt6-qtnetworkauth.git /var/lib/mock/f39-build-1584542-38137/root/chroot_tmpdir/scmroot/qt6-qtnetworkauth
Cloning into '/var/lib/mock/f39-build-1584542-38137/root/chroot_tmpdir/scmroot/qt6-qtnetworkauth'...
$ git fetch origin b91e029a428fbf265537ad3e4b4cf32c3993ac82:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt6-qtnetworkauth
 * [new ref]         b91e029a428fbf265537ad3e4b4cf32c3993ac82 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b91e029 6.6.0